Pierre de Fermat
Pierre de Fermat (French: [pjɛːʁ dəfɛʁma]; 17 August 1601 or 1607 – 12 January 1665) was a French lawyer at the Parlement of Toulouse, France, and a mathematician who is given credit for early developments that led to infinitesimal calculus, including his technique of adequality. In particular, he is recognized for his discovery of an original method of finding the greatest and the smallest ordinates of curved lines, which is analogous to that of the differential calculus, then unknown, and his research into number theory. He made notable contributions to analytic geometry, probability, and optics. He is best known for Fermat’s Last Theorem, which he described in a note at the margin of a copy of Diophantus’ Arithmetica. From Wikipedia, the free encyclopedia
He conjectured the most famous math theorem, Fermat’s Last Theorem, in 1637 in the margin of a copy of Arithmetica where he claimed he had a proof that was too large to fit in the margin. This theorem is one of the hardest, most harassing problems in human history, to which million mathematicians challenged for centuries. It is first proved after 358 years by Andrew Wiles in 1994.