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A176922
Primes of the form 2^k + 23.
2
31, 151, 549755813911, 604462909807314587353111
OFFSET
1,1
LINKS
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
Sequence in context: A201964 A226890 A104049 * A134553 A042880 A042882
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Apr 29 2010
STATUS
approved