Tagged with Mersenne prime

#math trivia #254 solution

#math trivia for #September11: #254 is the product of a prime and a Mersenne prime. What are the primes? — Burt Kaliski Jr. (@modulomathy) September 11, 2013 A Mersenne prime is a prime p that has the form p = 2q-1 where q is also prime. The prime factors of 254 are 2 and 127. … Continue reading

#math trivia #251 solution

#math trivia for #September8: #251 is the largest 8-bit prime. What are the largest 2-, 3-, 4-, 5-, 6- and 7-bit primes? (Why no 1-bits?) — Burt Kaliski Jr. (@modulomathy) September 8, 2013 The largest primes of length 2 to 7 bits are 3, 7, 13, 31, 61, and 127. As it turns out, the … Continue reading