Also known as Numeros Primos, this is a rare species, it is a part of the larger class of Natural Numbers, which turn out to all be made of primes. Primes have the special property that they are only divisible by one and themselves. This of course means 2 is the only even prime, which makes it the oddest of them all.

Prime Number: 2^237156667-1

by SuperReallyGoodAtMathGuy
December 19, 2008