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Largest known prime number

The Great Internet Mersenne Prime Search announces the discovery of the latest largest known prime number, a Mersenne prime with 23,249,425 digits equal to 2 77,232,917 [?] 1.

It clocks in at over a monstrous 23 million digits long, and is in a rare class of numbers called Mersenne primes.

  1. International Business Times (Image)