A176922 Primes of the form 2^k + 23.

31, 151, 549755813911, 604462909807314587353111

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..8

Formula

a(n) = 2^A057203(n) + 23. [R. J. Mathar, Jun 18 2010]

Mathematica

Select[Table[2^n + 23, {n, 0, 750}], PrimeQ] (* Vincenzo Librandi Jan 02 2014 *)

Prog

(Magma) [a: n in [0..750] | IsPrime(a) where a is 2^n+23];

Crossrefs

Cf. A000040, A057203.

Sequence in context: A201964 A226890 A104049 * A134553 A042880 A042882

Adjacent sequences: A176919 A176920 A176921 * A176923 A176924 A176925

Keyword

nonn

Author

Vincenzo Librandi, Apr 29 2010

Status

approved