Prove that every prime number other than 2, can be expressed as a difference of two squares.

- Princeton Math Club Website

(In reply to Solution by Jim Lyon)

The only point I could see of insisting on prime numbers is to force the (x² - y²) = (x + y)(x - y) to be the prime number itself and 1, forcing x and y to be consecutive. Once you realize this, it's child's play.

Posted by TomM on 2002-11-19 12:14:47