Dr. Elkies
BTW, Dr. Elkies, the author of the CGT chess article I mentioned a few days ago, has quite an impressive curriculum. Among other things, he disproved Euler's conjecture for fourth powers.
Intrigued by Fermat's last theorem, Euler proposed a variant which states that the sum of n-1 nth powers cannot equal another nth power (n>2.)
http://en.wikipedia.org/wiki/Noam_D._Elkies