http://fermatslasttheorem.blogspot.com/2005/05/fermats-last-theorem-proof-for-n3.html Fermat's Last Theorem: Proof for n=3 Leonhard Euler came up with two proofs for Fermat's Last Theorem: n = 3.One proof involved a very innovative method using irrational numbers. Unfortunately, Euler made a mistake in his proof. Despite this, his method revealed a very promising app..