IQ: 200 (±) candidates

IQ scale (ceiling fitted)
The Cox (1926) Buzan (1994) ten anchor-point geniuses, a basic measuring stick to potential candidate 200-range IQ individuals.
In intellectual categorizations, IQ: 200 (±) candidates are those that do not have specific previously estimated or tested IQs, but which whose retrospect intellectual life-long accomplishments would intuitively seem to merit an intellectual quotient, possibly, in the 200 range, plus or minus, via comparative extrapolation of those of those established 200-range IQs.

Update: see Genius IQ table (expanded version of this page + the IQ: 200+ page) a re-ranking of the 1000 greatest geniuses (with IQ over 140) of all time.

This being based on the premise that one can assign any individual, historical or present, a natural number (1, 2, 3, 4, 5 …) said to represent the “relative brightness or intelligence” of that person.

This page, which is a work-in-progress, being a precipitate of the IQ: 200+ and IQ: 225+ pages, discusses on this topic. A starting point point includes IQ: 200+ thread discussions (IQ: 200+ page threads or category IQ: 200+), sections from the IQ: 200+ page, e.g. last person to know everything group, internet discussions, hundreds of comments given on the popular 2009 video "IQ | Smartest person ever", and 2007-2010 polling to both scientists and general public, on the question of who are the three smartest people of all time. [1]

YouTube | Missing 200-range thinkers
The following are a growing collection of forum responses to so-called “missing geniuses” from the 2010 four part IQ: 200+ video series, organized by tallied votes (above) and actual dated response quotes (below):

Tesla (57 votes) (and counting; @ 27 May 2012)
Thims (35 votes) (in three week period: 04-25 May 2012)
Euler (3)
Feynman (3)
Poincare (2)
Kant (1)
Ramanujan (1)
Thims YouTube 25 May 2012 34v f
A 2012 YouTube thumbs up ranking of Thims as having the "highest IQ" ever (with 34 thumbs up), above that of Goethe (IQ=230), Einstein (IQ=220), and Newton (IQ=215), from the comments section of part four of the "IQ 200+ | Smartest person ever"External link icon (c) video (rate: 1.5 thumbs-up votes / 336 views day), a countdown to the last universal genius, German polymath Johann Goethe, ranked, starting from the Cattell 1000, the 1894 listing of the thousand most eminent individuals of history, by a team of Stanford psychologists led by Catherine Cox (Early Mental Traits of 300 Geniuses, 1926) and Lewis Terman, the group that invented the IQ scale, with an IQ of 225, the highest of all modern genius IQs.

Arhur Rubin, Noam Elkies, Lenhard Ng, Andrew Hsu, Paul Erdös.

● alphawolf099 (May 2012): “i think the guy narrating the video has the highest iq”

Note: the above comment was “top comment” thread viewable from about May 4th to May 25th, 2012, during which period it was drawing thumbs up votes at a rate of 1.5 thumbs-up votes / 336 views day (1 thumbs-up vote per 224 views); after which the thread was removed (by Thims).

● Billycarr (Jun 2011): “So where's Euler again? Isn't he considered the greatest mathematician ever?”
● igankyoumaybe (Sep 2011): “there's no Poincaré or Feynman or Euler”?
● MrElephantMemory (Oct 2011): “In terms of potential, William James Sidis is definitely the brightest man ever lived. But because of the jealousy of people around him and his social imbalance, he wasted his talent unfortunately. In terms achievement and creativeness, my top 5 would be Leonhard Euler, Isaac Newton, Nikola Tesla, Srinivasan Ramanujan and Paul Erdös.” (12+ votes)

● “Some of the stuff you said is OK more, less, but the main thing, the number one genius of all time is NIKOLA TESLA, and you didn't even put him to list... His contribution, works, inventions cannot be matched to any other man. Many of his theories are not even understood by today's man, still. Next time do some more research.” (jimmyglo, 29 Apr 11)
● “Nikola Tesla was, is, and will be the greatest scientist of all time. There is no match for him.” (8Vladimir7, 14 Apr 11)
● @marcmody “Tesla wasn’t that smart hahahaha…” (2 Apr 11, orangegold)
● @orangegold1 “Oh yes he was.” (12 Apr 2011, mannydegger)
● “Emanual Kant, Nicola Tesla?” (marcmody, Mar 2011)
● “Where's Tesla in all of this?” (MosteProduction, Feb 2011)
● “What about men like Tesla and Newton or, the real super geniuses, Goethe, Leibnitz and da Vinci?” (NiXPredator, Jan 2011)
● “Nikola Tesla is not on this list. Why?” (ParadoxPerspective, Mar 2011)

givemeblowjob69 (an atheist scientist) estimates Feynman’s IQ at 190-200 (link) (31 Oct 2011).
● “Richard Feynman was a true magician. The reason he’s not on this list is because he transcends it. He also proves that IQ is not everything.” (BANGBANGBANGBBANG, Mar 2011)
● “Estimated IQs are useless, Terence Tao's IQ was never actually tested. I'm sure if Richard Feynman or Henri Poincare never took an IQ test everyone would've "estimated" their IQs to be extremely high.” (itsnobody, Feb 2011)

● “I'm curious. Why is Andrew Hsu not on your list?” (gojase, 25 Mar 11)
● “Estimated IQs are useless, Terence Tao's IQ was never actually tested. I'm sure if Richard Feynman or Henri Poincare never took an IQ test everyone would've "estimated" their IQs to be extremely high.” (itsnobody, Feb 2011)
● “I think Michael Grost is the most outstanding of these people. When he was in his early teens, he was one of the best mathematics COLLEGE students in the country, he achieved honorable mention on the Putnam Mathematical Competition. By the way, so did a guy called Arhur Rubin. Also, I'd be interested in the IQs of Noam Elkies and Lenhard Ng.” (mozart20dlubos, Dec 2010)

Goethe-Da Vinci range
The main sources for 200-range IQ estimates are from the research done by Cox (1926) and Buzan (1994). The consensus of these two geniuses lists indicates, diagrammed above, indicate that there are only two uniformly agreed-upon 200-range IQ individuals to have ever lived: Leonardo Da Vinci (IQCB=200) and Johann Goethe (IQCB=213). Goethe is also one of the six individuals said to have known everything; and Da Vinci comes in second place in colloquial polls as to who is the smartest person of all time. These two minds give us a ruler with with which to compare and make potential estimates of other possible overlooked high-end IQ candidates.

Cox-Buzan Anchor Point IQs
Goethe (75px)
Goethe (1749-1832)
Leonardo da Vinci
Da Vinci (1452-1519)
Gottfried Leibniz (75px)
Leibnitz (1646-1716)
Isaac Newton (75px)
Newton (1643-1727)
Galileo (1564-1642)
John Stuart Mill
Mill (1806-1873)
Descartes 75
Descartes (1596-1650)
Michelangelo (1475-1564)
Spinoza (1632-1677)
Faraday (1791-1867)

People Said to Have Known Everything
Athanasius Kircher 75
Athanasius Kircher (1602-1680)
Thomas  Young 75
Thomas Young (1733-1829)
Goethe 75 new
Johann Goethe (1749-1823)
Alexander Humboldt 75
Alexander Humboldt (1769-1859)
Joseph  Leidy 75
Joseph Leidy (1823-1891)
Thorstein Veblen 75
Thorstein Veblen (1857-1929)


1850| Emerson's Six Representative Men
The following are American philosopher Ralph Emerson’s six greatest all-time geniuses found in his 1850 book Representative Men. [3] Emerson's list was cited by Harold Bloom as a forerunner to his 2003 Genius: a Mosaic of One Hundred Exemplary Creative Minds (who also included Goethe in his top 100 geniuses).

1850 | Emerson's Six Great Men

Plato 75
Emanuel Swedenborg
Montaigne 75
Napoleon 75
Goethe 75 new


1880 | Nietzsche’s uberman

In circa 1880, German philosopher Friedrich Nietzsche (1844-1900) assembled his personal listing of the seven archetypes (uberman) of individuals that would eventually result to replace God in the future:

1880 | Nietzsche's uberman | Archetypes to the future replacement god
Socrates 75
Caesar 75
Leonardo da Vinci
Da Vinci
Goethe (75px)
Napoleon 75

1950 | Durant’s ten greatest thinkers
The following is American writer-historian-philosopher Will Durant (1885-1981)’s circa 1950 list of the ten “greatest thinkers” of all time from the 2002 collected works book The Greatest Minds and Ideas of All Time. [2]

Durant's 10 greatest "thinkers"
Confucius 75
Plato 75
Aristotle 75
Copernicus 75
Thomas Aquinas 75
Francis Bacon 75
Isaac Newton (75px)
Voltaire 75
Kant 75
Darwin 75


1996 | Glenn's twenty greatest scientific minds
In the 1996 book Scientific Genius: the Twenty Greatest Minds, American writer Jim Glenn states that "Archimedes, Galileo, Newton, Darwin, and Einstein probably make everyone's scientific top twenty" and on this assumption devotes his book to the following top 20 greatest scientific minds, in chronological order:

Glenn's 20 greatest scientific minds
Aristotle 75
HarveyDescartes 75
PascalIsaac Newton (75px)
Gauss 75
Darwin 75
GaloisMendelKochPavlovAlbert Einstein (1905)  (75px)
HeisenbergNeumann 75
TuringPauling 75

2010 | Common opinion
The following is are the results of a street poll conducted by American chemical engineer Libb Thims with the query: "name the three smartest people of all time", the results shown in descending order of popularity of response. [1]

Street Poll | Smartest Person of All Time
Albert Einstein (1905)  (75px)
Leonardo da Vinci
Da Vinci
Isaac Newton (75px)
Tesla 75

IQ | estimates
The following are a few tentative 200± candidates, listed in a loose discernible order who seem to have at a minimum an IQ of 140. The following listing, then is a tentative listing, so which to give further time for the topic to marinade. Post discussion below if opinionated on this subject. Some have been tentatively added to the main 200+ IQ page, as indicated.

No T
IQ (?)

Clausius 75Rudolf Clausius
● His 1865 mechanical theory of heat, according to Einstein (IQ=160-225), is the only the theory, in science, of universal content, least likely to be ever be overthrown.

Maxwell 75James Maxwell
● Millennium poll voted Maxwell as the third greatest physicist of all time, after Newton (IQ=190-200) and Einstein (IQ=160-225)" (link)

● #1 greatest equations of all-time (Crease, 2004); #3 greatest equation to change the world (Guillen, 1995); originator of Maxwell's demon; founder of electromagnetic theory a founders of thermodynamics; first color photograph; work formed the basis of Einstein's work; Mahon’s 2003 book The Man who Changed Everything, gives an idea of the density of Maxwell’s mind, etc.

Gibbs (75px)Willard Gibbs
200● His work On the Equilibrium of Heterogeneous Substances, which founded chemical thermodynamics, is so dense that very few people (such as Maxwell, Clausius, and Lewis) have been able to understand it; he his one of founder of statistical mechanics (1901);
● William Cropper (Great Physicists, 2001) states that: “Few theoretical scientists have had the talent and assurance to do their work in such isolated fashion. Only Einstein (IQ=160-225)—who wrote some of the most important papers before he even laid eyes on another theoretical physicist—may have outdone Gibbs in this respect.”
● Einstein, himself, described Gibbs as “"one of the most important and creative minds in the field of science America has produced.”
Ludwig Boltzmann described Gibbs "the greatest synthetic philosopher since Newton (190-200)."
● J.J. Thomson described Gibbs as: “one of the greatest molecular physicists in the world.”
● E.P. Bell describes the reading of Gibbs' Equilibrium as something like reading Pierre Laplace (IQ=190).
● John Strutt commented to Gibbs that his Equilibrium was “too condensed and too difficult for most, I might say, all readers.”

Thomas Young 75Thomas Young (1733-1829)190-200
● Translator of the Rosetta stone, inventor of the double slits experiment (1801), can first to coin the term energy (1807), in its modern formulation, and his kinetic energy work formed a partial basis for the later (1811) work of Joseph Lagrange (IQ=185) who used calculus to show that a factor of two (or ½) is involved in the relationship “potential” (potential energy) and “vis viva” (kinetic energy).

Helmholtz 75Hermann Helmholtz
190● A founder of thermodynamics and chemical thermodynamics; work on conservation of force and physiology is that upon which Freud (IQ=156) is built; theorized about the thermodynamics of Goethe's Faust; pioneer of acoustics theory, etc.

Euler 75
Leonhard Euler
● #2 greatest equations of all-time (Crease, 2004); his work in mathematics formed a large part in the development of the modern language of science.

Other possible/questionable 200+ IQs?

The following are individuals having marginal or questionable references (needing further corroboration) to claims of possible 200+ IQs:

Gregory Smith● Gregory Smith (1989-) (IQ=186, 200+) (IQ scores) (Gregory R. Smith) (Hi IQ News link); Quote: “[His IQ] is in the top one quarter to one-half percent of IQs in the world.”; Leung, Rebecca. (2005). “Whiz Kids: Science, Music & Memory”, 60 Minutes, July 01.; (Article: BS in mathematics, in 2002, at age 13; plans to have four PhDs by age 27 (2016)). (IQ=186); in 2005, age 16, Smith was working towards four doctorates: math, aerospace engineering, international relations, and biomedical research (link). Ivan  Cherevko ● Ivan Cherevko (1991-) (IQ=200+) (Quote: “his IQ has been estimated at much higher than 200” (link) (IQ scores) (AskMeHelpdesk) (Twitter) (link); reading at age 3; began winning various science, law, and dictionary awards at age 8 (link); wrote first book age 10 on topics ranging from microbiology to heraldic to poetry (link); entered the Kyiv-Mohyla Academy, and elite Ukrainian university at age 12 (link); at age 14 stated that he’s “developed the analytical theory of a municipal solid waste management, storage and recycling - both post-factum and pre-factum”.
Daniela Simidchieva 75px● Daniel Simidchieva (c.1955-) (IQ=193, or 200?)
● Hristakieva, Diana. (2009). “Daniela Simidchieva: by Being Good we Bring Good to Our Lives”, BNR Radio Bulgaria.
● Sherriff, Lucy. (2004). “World’s Cleverest Woman Needs a Job: an IQ of 200 is a Sorry Thing to Waste.” The Register.
● Amble, Brian. (2004). “IQ of 200 but can’t Get a Job”,
● Anon. (2005). “World’s Cleverest Woman Inundated with Job Offers in Bulgaria”,
Marta Eugenia Rodiguez 75 ● Marta Eugenia Rodiguez (Martha Eugenia Rodriguez de la Torre) (1969-): IQ=218 at age 6 (link); Quote: “I have an IQ of 218, that of Einstein was 180” (link).

● Adrian Seng (or Terence Tao?) (Possibly a Miraca Gross (Exceptionally Gifted Children, 1993) assigned pseudonym) (1977-) (IQ=233) spoke first word at 13-months; taught himself to read before age 2; by age 3, could read, write, and do math at a six-year-old level; at age 3.5 could multiply two-digit numbers in his head. Quote: “at age of 6 years he was assessed on the Stanford-Binet and was found to have a mental age of 14, a ratio IQ of more than 220 [possibly: (14/6)*100=233]; scored 760 on the SAT (mathematics) at 8-years 10-months; completed BS at age 15; completed MS at age 17; then won major scholarship to study math at a prestigious American university. [9]
● Gena Leung (1983-) (IQ=210) at age 5-years 7-months, began to teach other children how to read; at age 11, scored 730 SAT-M; at age 10 was studying French, Latin, and Japanese; completed her university entrance math qualifications at age 13; at age 16, was a certified violinist and also a member of the five person Australian team that competed in the International Physics Olympiad; was diagnosed with depression at age 18, placed on medication, and withdrew from school for a year; at age 20, has “completed a three-year bachelor of medical science degree and is now commenced a four-year bachelor of medicine degree. She wants to make her career in medical research”; quote: “assessment on the Stanford-Binet L-M, two weeks after her tenth birthday, revealed a mental age of 21 years and thus a ratio IQ in excess of 200 [specifically: (21/10)*100=210]”; [21]
● Ian Baker (1980-) (IQ=200); spoke first word at 12-months; reading and counting before age two; quote: “[at 9 years and 3 months] Ian scored a mental age of 18 years and 6 months and thus a ratio IQ of 200.”. [9]
● Christopher Otway (1977-) (IQ=200) taught himself to read before age 2; was reading children's encyclopedias at age 4; at 11-years 4-months, scored 710 on the SAT-M (supposedly fewer than 4-percent of college-bound eighteen-year-olds score at this level) and 580 on the SAT-V; Quote: “at age 11, he achieved a mental age of 22 on the Stanford-Binet, and a ratio IQ of 200.” [9]
● Quote: “Pascal and Voltaire both probably had IQs in the neighborhood of 200.” [3]
● Masoud Karkehabadi (1981-) (IQ=200+, at age 11). [8]
● Joseph N. Hall (1966-) Quote: “he was assigned an IQ of 200” (link); quote: at age 9 his “intellect can’t be measured by simple intelligence quote tests” (link); in college at age 11 (link); Wikipedia User page (link); Wikipedia article (link); EoHT discussion thread (link).

Some of the people listed here are found with mentions of high IQ scores simply based on having taking various 40+ question IQ tests (which take about 100-hours to obtain a high score); then, via various convoluted extrapolation formulas, go on to claim that an obtained score of say 44/45 equates to an IQ of 190 and that if this score is ratioed to another so-and-so scale it gives a “ratio IQ” of 250, etc. Scoring 48/48 on what is called the mega test, for instance, is said to give an adult or deviation IQ of 210+. Thus, supposedly, if one takes a 100-hour logic problem test and gets a perfect score, one will be as smart as Goethe, which is an illogical conclusion.

The Mega Society has in article entitled "Who's the Smartest Person on Earth" (link) in which they give a list of seemingly unknown individuals, being qualified by their “Mega Test”, as having ratio IQs of 204+ or deviation IQs of 174+: Anthony Bruni, Arthur Kantrowitz (Mark Kantrowitz), Jim Ferry, John Sununu, Benoit Desjardins, Keith Raniere, Kevin Langdon, Paul Johns, Ferris Alger, Rick Rosner, Greg Treyling, Ronald Hoeflin, Solomon Golomb, Steve Schuessler. These types of scoring methodologies, however, make little sense when compared, for instance, to someone like Einstein (IQ=220) who spent decades on one single question: “what happens when you try to run alongside a beam of light?” or Goethe (IQ=230) who spent about half a century on the question of the relationship between chemical affinity, love, life, work, and death. Another Mega Society lists individuals, supposedly, in the IQR=183, IQD=164+. [4]

Anon 200+ IQs
● Lovecky (1993) discusses the mindsets of 6 children scoring over IQ 200 via scores obtained using the Stanford-Binet Intelligence Scale Form LM, e.g. Zachery (age 7), James (age 9), Lydia (age 11), and Christopher (age 11). [10]
● Anon girl (c.1910-) Quote: "Langenbeck (1915) described a young girl who at age 5 had a mental age of 11 years (and thus a ratio IQ of over 200), and an oral vocabulary of almost 7,000 words.”; Langenbeck, M (1915). “A Study of a Five-year-old”. Pedagogical Seminary, 22, 65-88.; Gross, Miraca U.M. (1993). Exceptionally Gifted Children (pg. 25). Routledge.
● Quote: Theman and Witty (1943) reported a girl, ‘B’, with an IQ of 200, who took several steps by herself at age 8 months ‘under the excitement of running after a dog’. [9]
● Quote: “Morelock (1995) is engaged in a longitudinal study of six children of IQ 200+.”; (a) Gross, Miraca U.M. (1993). Exceptionally Gifted Children (pg. 21). Routledge; (b) Morelock, M.J. (1995). “The Profoundly Gifted Child in Family Context”, Unpublished Doctoral Dissertation, Tufts University.
● Quote: “Zorbaugh and Boardman (1936) described a boy, ‘R’, of Stanford-Binet IQ 204, who began to design and make books at the age of 3 and who had applied to the US patent office for two patents by the time he was 8.” [9]
● David (1975-) (IQ=200) at age four, speaks 6 languages, interested in comparative philology, calculates mathematical equations, does chemistry experiments, studies the violin, reads New York Times and college textbooks, asked his parents to find him a physics tutor to explain parts of the electromagnetic spectrum, which he didn’t understand (all at age 4). [23]
● Quote: “Dr. Julian Stanley knows two children with IQs in the 200 range.”
● Korean boy (IQ=210): at age 4-years, 8-months spoke four languages (McWhirter, Norris. (1978). Guinness Book of World Records (category: Highest IQ, pg. 49). Bantam Books.)
● From 1979 to 2009, the Gifted Development Center, in Denver, Colorado, has assessed over 5,600 gifted children, finding 18% to be exceptionally gifted (IQ=160+) and 87 to be above 200 IQ (link); prior to this, a consultant to parents of gifted children in the Denver, Colorado area found more than 42 people with an IQ above 200 since 1979. [11] This would imply that cities the size of Denver, with populations around 500,000, would produce about 1 to 2 children per year with IQs about 200.
● Anon nine-year-old African-American girl (c.1930s) (IQ=200) (Simonton, Dean K. (1994). Greatness: Who Makes History and Why (pg. 31). Guilford Press).
● Anon Las Vegas waitress (c.1970-) (IQ=238); Quote [Marta Eugenia Rodiguez (IQ=218)]: “the smartest person in the world is a waitress in Las Vegas, who has an established ratio IQ of 238”, 2007 interview (link).

Unknown IQs
Ruth Lawrence● Ruth Lawrence (1971-) (IQ=?) BS mathematics (1985) at age 13, BS physics (1986) age 14, and PhD (1989) age 17 at the University of Oxford; academic post at Harvard (1990) at age 19, and associate professor with tenure at the University of Michigan in 1997.Alia Sabur● Alia Sabur (1989-) (IQ=?) completed BS (2003) in applied mathematics from Stony Brook University at age 14; MS (2006) and PhD in materials science and engineering at Drexel University; professor of mathematics at age 19.
Eric Demaine● Eric Demaine (1981-) (IQ=?) BS age 14; MS mathematics age 15; PhD age 20; joined the MIT faculty in 2001, at age 20, reportedly the youngest professor in the history of MIT.Vinodhini Vasudevan● Vinodhini Vasudevan (1986-); read 100 books the summer she was 5 (link); mastered college algebra at age 8; at age 12 set record by becoming the youngest person to score a perfect 1,600 (800 on math, 800 on verbal) on the SAT (link), correlates to IQ 165 (link); could be age ratioed higher (e.g. (18/12)*165=247?; in 2007, at age 21, graduated from MIT with a BS in electrical engineering with a minor in biomedical engineering (link).
Moshe Kai Cavalin● Moshe Kai Cavalin (1998-) completed an associate’s degree in astrophysics (age 11) in 2009. Balamurali Ambati  75● Balamurali Ambati (1977-) mastered calculus age 4; BS age 13 from New York University; MD at age 17 from Mount Sinai School of Medicine; ophthalmology residency at Havard; in circa 1987, Set a goal to become the youngest graduate of medical school after reading about Ben-Abrahman’s record in the Guinness Book (link), did so at age 17 years, 294 days.
Sky Choi Sky Choi (1997-) (IQ=?) at age 3, could speak and read both English and Korean; started taking college courses at age 10 (link); was taking Calculus II, Intermediate Chinese Conversation, Physics with Calculus, at age 12 (2009), at Florida International University, plans to double major in physics and math (link).● Jay Luo (1970-) BS mathematics at Boise State University in 1982 (age 12) with a B+ average, degree completed in three years (link); started graduate work at Stanford afterward, but dropped out.

IQ: 200 estimation issues
The topic of estimating 200 range IQs is a difficult subject, primarily owing to the fact that there are different facets of intellect. Moreover, aside from the rigorous Cox-Buzan ranking methodology, in which entire books on the subject are written, groupings of geniuses in bulk to give a side-by-side comparison, using a formulaic point-per-facet scoring methodology to discern rank. Aside from these estimate references, the other "claimed-to-be" 200-range individuals originate from the following main secondary sources:

● American philosopher Ronald Hoeflin’s 1985-1999 Omni magazine Mega Test.
● Childhood age-ratio extrapolations Stanford-Binet test scores.

Nearly all 200-range estimates originating from these two sources are or seem to be false positive estimates, in some cases yield pure outlandish estimates (e.g. De Mello's (IQ=400) father claiming his child to be twice as smart as Da Vanci (IQ=200)). This is compounded with a smattering of accelerated learning child psychologist test estimates, a few parental estimates of their own children (e.g. Kearney, De Mello, etc.), along with one or two show boaters (e.g. Rick Rosner or Marilyn Savant) who, seeking publicity, find juggle or fudge the results of their own test scores until they so to tell people that they have a 200-range IQ. When these estimated 200+ individual are grouped and sorted, separating the whey from the curd, the issue arises that there seem to famous potential 200-range individuals missing from the list. This page, subsequently, discusses this issue.
Paul Cooijmans
Giga society founder Paul Cooijmans; a Danish guitar teacher who claims to have an IQ of at least of 196 (thus believing himself to be smarter than both Newton and Leibniz)

IQ societies
The original IQ society, Mensa, occasionally boasts a few claimers to have supposed 200-range IQs (e.g. Marlyn Savant or Daniel Simidchieva).

The claimed-to-be top of these sites, the Giga Society, founded in 1996 by Danish guitar teacher Paul Cooijmans (link), claims to have members all with IQs at or above 196, some of which include: Suresh Sharma, Paul Johns, Andreas Gunnarsson, Thomas R. A. Wolf, Evangelos G. Katsioulis, Rolf Mifflin, and Scott Durgin. Cooijmans claims to have created the “world's hardest I.Q. tests attracting over 2000 candidates”.

These individuals, however, seem to be pure show-and-tell IQ estimates, as evidenced by Savant's faked IQ scores. To give an example, when Evangelos Katsioulis was requested to submit a modern-day scientific explanation of Goethe's Elecltive Affinities, he declined. These individuals may certainly be clever, but not in the Da Vinci-Leibniz-Newton IQ range (193-200), as they claim to be.

Fake/scam/joke/boast 200+ IQs?
One can also find random anonymous parents online postings making claims to their children's intelligence (e.g. “As a parent of a 7 year old with 200 IQ, what advice would you give to our family?” (2002 article); this, generally, is an example of the difference between parentally-driven (derived) IQ scores (e.g. Sidis) versus self-driven (derived) IQ scores (e.g. Einstein).

● Jim Diamond (1942-) Quote: his score of 200+ was achieved under the strictest conditions using the best IQ testing system in the world.” (link); supposedly scored “very superior” or three standard deviations above the mean (IQ=145) on the Wechsler Adult IQ test (which has a max IQ score of 155) (link), but he boasts that this equates to 200+.

Avi Ben-Abraham● Avi Ben-Abraham (1957-) Quote: “His IQ is so high that it cannot even be measured.” Boasting: mastered relativity at age 7; MD at age 18 from the University of Perugia, Italy; held Guinness Book record 1987-90 as youngest doctor;
● Quote: "estimated IQ around 250" (link), supposed based on one of these 22 Jul 2001 Chicago Tribute articles (link) (link)
● supposedly all faked or scammed (link, link, link, etc.)?
Maria Dos Marinos 75● Maria Dos Marinos (1941) (IQ=307) (link)

Internet Joke IQs
William Alfred Quannigton (Child IQ=350+; Adult IQ=300+) is a fictional person introduced as a joke by an anonymous poster on Sep 5, 2006, to both the AnswerBag forum: "What is the highest rating of IQ ever recorded?" and, it seems, to the "What is Stephen Hawking's IQ" forum, at (see link), claiming that he was Quigly Anderson (see: blog), who was writing book on the 50 highest IQs ever recorded. Below is an archived screenshot of the post (see: archived link):

Quigly Anderson 1
Quigly Anderson Ten Highest IQs
Quigly Anderson 2
Quigly Anderson 3photo crop 2Photo crop

In the years to follow, this quickly became incorporated into various high IQs Internet lists. It was likely a on William James Sidis. See examples (here, here, here, etc.). This may be, from where the Da Vinci IQ=225 estimate originated (as Cox estimated 180 and Buzan estimated 220)?

Brandenn Bremmer

Brandenn Bremmer (1991-2005), in 2001, at age 10, shown next to the stack of books he had absorbed to finish high school prior to entering college that year; shot himself in the head four years later (link).

200-range IQs and suicide
● Brandenn Bremmer (1991-2005) – scored IQ=178 on a test at age five, at age 10, his first year of college as a music prodigy, was said to have an IQ twice his weight; later stated in an interview that “America is a society that demands perfection”; shot himself in the head at age 14.
● Chris (or Justin) Chapman (1996-) (IQ=298) at age 6 the IQ purported was fabricated by his mother Elizabeth Chapman; who had her child removed after he attempted suicide a year latter. [5]

1. Polling done in person by American chemical engineer Libb Thims.
2. Durant, Will. (2002). The Greatest Minds and Ideas of All Time (ch. 2: The Ten Greatest Thinkers, pgs. 8-30). Simon and Schuster.
3. (a) Emerson, Ralph Waldo. (1850). Representative Men: Seven Lectures. H.G. Bohn.
(b) Bloom, Harold. (2003). Genius: a Mosaic of One Hundred Exemplary Creative Minds (Emerson’s Representative Men, pgs. 6-8). Warner Books.
4. Interesting people (IQD=164+; IQR=183+) –

Further reading
● Gross, Miraca. (1992). “The Early Development of Three Profoundly Gifted Children of IQ 200”, in: To Be Young and Gifted, edited by P.N. Klein and A.J. tannenbaum: 94-140. New Jersey: Ablex.

External links
100 Scientists Who Shaped the World (four lists) –

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