### Some articles on *mersenne primes, prime, mersenne prime, primes*:

Power Of Two -

... A

**Mersenne Primes**... A

**prime**number that is one less than a power of two is called a**Mersenne prime**... For example, the**prime**number 31 is a**Mersenne prime**because it is 1 less than 32 (25) ... Similarly, a**prime**number (like 257) that is one more than a power of two is called a Fermat**prime**the exponent will itself be a power of two ...List Of Prime Numbers - Lists of Primes By Type - Double

... A subset of

**Mersenne Primes**... A subset of

**Mersenne primes**of the form for**prime**p. 7, 127, 2147483647, 170141183460469231731687303715884105727 (**primes**in A077586) As of 2011, these are the only known double**Mersenne primes**, and number ...List Of Prime Numbers - Lists of Primes By Type -

... As of 2011, there are 47 known

**Mersenne Primes**... As of 2011, there are 47 known

**Mersenne primes**(The 47th discovered is actually the 46th in size) ...Safe Prime - Further Properties

... is no special primality test for safe

... is no special primality test for safe

**primes**the way there is for Fermat**primes**and**Mersenne primes**... With the exception of 5, there are no Fermat**primes**that are also safe**primes**... Since Fermat**primes**are of the form F = 2n + 1, it follows that (F − 1)/2 is a power of two ...Main Site Subjects

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