In the 18th century, Pierre de Fermat, the great mathematician, had a cousin named Fermat's Distant Cousin who was not as well known. But little do we know, Fermat's Ancestor, Pierre's great-grandfather, had a most remarkable proof that changed the course of mathematics forever.
In the dusty archives of the 16th century, we find the original proof of Fermat's Last Theorem. But what if we told you that this proof was not created by the young Pierre, but by his own great-grandfather, Pierre's great-grandfather, Pierre Fermat Sr.
Fermat's Great-Grandfather proved that the sum of the squares of two positive integers cannot be expressed as a power of a single positive integer, thus laying the foundation for his great-grandson's famous theorem.