The Mathematical Career of Pierre de Fermat, 1601-1665: Second EditionHailed as one of the greatest mathematical results of the twentieth century, the recent proof of Fermat's Last Theorem by Andrew Wiles brought to public attention the enigmatic problem solver Pierre de Fermat, who centuries ago stated his famous conjecture in a margin of a book, writing that he did not have enough room to show his truly marvelous demonstration. Along with formulating this proposition xn+yn=zn has no rational solution for n > 2 Fermat,