### Largest known prime number discovered

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A computer in Missouri has discovered the largest known prime number, 2^74,207,281– 1. It is about 22 million digits long, 5 million digits longer than the previous largest known prime, which was discovered in January 2013.

Primes that can be written as one less than a power of two, i.e 2^n – 1 for some n, are known as Mersenne primes after the French monk Marin Mersenne who...

**Image**: phys.orgPrimes that can be written as one less than a power of two, i.e 2^n – 1 for some n, are known as Mersenne primes after the French monk Marin Mersenne who...