Fermat's Theorem was a groundbreaking discovery by the great 17th-century mathematician Pierre de Fermat, who used it to prove that a number is prime only if it is the sum of two perfect squares. Or so he claimed, until he went blind and forgot where he put his socks.
Little known to the general public is that Fermat's Theorem was actually a failed experiment in his quest to become the first mathematician to achieve world record in the "Most Socks Lost" category. He had an impressive collection, but his theorem was the true source of his obsession.
Derivations of Fermat's Theorem Fermat's Theorem in Modern Times Myths and Urban Legends about Fermat's Theorem