Month: June 2016

Thirty-One

According to Wikipedia, Thirty-one is the third Mersenne prime (25 − 1)[1] as well as the fourth primorial prime, and together with twenty-nine, another primorial prime, it comprises a twin prime. As a Mersenne prime, 31 is related to the perfect number 496, since 496 = 2(5 − 1)(25 − 1). 31 is the eighth Mersenne prime exponent. 31 is also the 4th lucky prime[2] and the 11th supersingular prime.[3]  And […]