Fun math fact: 19937 is prime even when you take the end digit and put it back at the start repeatedly.

[moule@mastodon.moule.world]

Fun math fact: 19937 is prime even when you take the end digit and put it back at the start repeatedly. It's known as a circular prime:

19937 = prime
71993 = prime
37199 = prime
93719 = prime
99371 = prime

It's also one of the 52 known Mersenne prime p-values (2^p-1), as 2^19937-1 is prime, and this Mersenne prime is the most common used period length for the Mersenne Twister pseudorandom number generator.

#Math #Mathematics #PrimeNumbers #MersennePrime #CircularPrime