The highest IQ mathematicians in history

If any field should line up with IQ, it is mathematics: abstract patterns, long chains of deduction and problems with one right answer are exactly what reasoning tests sample. That is why so many of the highest historical estimates belong to mathematicians, and why so many popular "genius" claims cluster here. It is also why the evidence deserves extra care.

Leibniz, Pascal, Descartes and Laplace have Cox 1926 figures because their childhoods were documented in detail: Pascal is said to have worked out Euclid's early propositions for himself, and Leibniz taught himself Latin from his father's library. Gauss and Euler, surprisingly, have no confirmed Cox figure, so their numbers are editorial. For the 19th and 20th centuries the numbers are editorial markers, set from documented achievement such as a proof, a prize or a new field, and labelled with very low confidence.

The list rewards early, documented brilliance. Galois and Abel did work in their teens and early twenties that reshaped algebra before they died young; Ramanujan arrived in Cambridge with notebooks of results nobody had taught him. Prodigies with a record of what they did at each age receive high estimates because that is what historiometric methods measure.

Late developers sit lower than their importance. Weierstrass, not on this list yet, did his best work in his forties; Riemann was a shy, slow-publishing student. Mathematical greatness is not the same as early speed, and the ranking cannot capture depth, taste or the patience to work on one problem for a decade.

There is one modern exception to "no test scores": Terence Tao, who has a separate profile, scored 760 on the SAT maths section at eight. He is left off this list because living people with claimed scores would distort a ranking of estimates. The same rule keeps out other reported prodigies.

The modern tests closest to mathematical reasoning are matrix and number-series puzzles: find the rule, apply it, check it. That is the same habit of mind these mathematicians used at the highest level. The LifeScore test uses timed visual reasoning items of that kind, which is the most direct way to see how your own pattern-finding compares.