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/* How many prime numbers */ updated following paragraph with info from the source.
The largest known prime is ''2<sup>57885161</sup>-1''; it was discovered in 2013 by Curtis Cooper with the '''Great Internet Mersenne Prime Search''' ('''GIMPS''')<ref>http://www.mersenne.org/</ref>, a distributed computing project launched by George Woltman in early 1996.<ref>http://primes.utm.edu/largest.html</ref>
A '''Mersenne prime''' is a prime number ''M'' that is of the form ''M = 2<sup>n</sup> − 1'', where ''n'' is some [[prime number]]<ref>[http://mathworld.wolfram.com/MersennePrime.html Mersenne Prime] from Wolfram</ref>. As of 20122015, only 47 48 Mersenne Primes have been found.<ref>http://primes.utm.edu/largest.html#largest</ref> The largest known prime, ''2<sup>4311260957885161</sup>-1'', is a Mersenne Prime. The concept of a Mersenne Prime was discovered by the French theologian, philosopher and mathematician [[Marin Mersenne]].
==Unique Factorization==
