A174265 Odd Mersenne exponents.

3, 5, 7, 13, 17, 19, 31, 61, 89, 107, 127, 521, 607, 1279, 2203, 2281, 3217, 4253, 4423, 9689, 9941, 11213, 19937, 21701, 23209, 44497, 86243, 110503, 132049, 216091, 756839, 859433, 1257787, 1398269, 2976221, 3021377, 6972593, 13466917

Offset: 1

Author

Juri-Stepan Gerasimov, Mar 14 2010

Keywords

• nonn

Comments

Primes p such that exactly one of 2^p-1 and 2^p+1 is prime.

Links

• Amiram Eldar, Table of n, a(n) for n = 1..47

Crossrefs

Cf. A000043, A092506.

Programs

Mathematica

MersennePrimeExponent[Range[2, 48]] (* Amiram Eldar, Oct 21 2024 *)

Formula

a(n) = A000043(n+1).

Extensions

Corrected by Charles R Greathouse IV, Mar 19 2010