Amdy Beal\'s Math Problem
 

I'm not sure if it is the Andy Beal of gambling fame, but I found this unsolved problem online

BEAL'S CONJECTURE: If A^x +B^y = C^z , where A, B, C, x, y and z are positive integers and x, y and z are all greater than 2, then A, B and C must have a common prime factor.

link

Melch