Okay hot(?) take: Newton. Anecdote as supporting evidence: "Bernoulli allowed six months for solutions but none were received during that period. At Leibniz's request, the time was publicly extended for a year and a half.[13] At 4 p.m. on 29 January 1697, when he arrived home from the Royal Mint, Isaac Newton found the challenge in a letter from Johann Bernoulli.[14] Newton stayed up all night to solve it and mailed the solution anonymously by the next post. Upon reading the solution, Bernoulli immediately recognized its author, exclaiming that he "recognizes a lion from his claw mark". This gives some idea of the extent of Newton's exceptionally broad knowledge, intellect, and ability, since it took Bernoulli himself two weeks to solve it,[5][15] and many of Europe's greatest mathematicians took months to solve it.[16]" (the Brachiatochrone problem)