A104071 Primes of the form 2^k + 27.

29, 31, 43, 59, 283, 1051, 8219, 16411, 65563, 1099511627803, 2199023255579, 17592186044443, 77371252455336267181195291, 1298074214633706907132624082305051

Offset

1,1

Links

Table of n, a(n) for n=1..14.

Formula

a(n) = 2^A157007(n) + 27. - Elmo R. Oliveira, Nov 08 2023

Mathematica

a = Delete[Union[Flatten[Table[If [PrimeQ[2^n + 27] == True, 2^n + 27, 0], {n, 1, 400}]]], 1]

Prog

(Magma) [ a: n in [0..750] | IsPrime(a) where a is 2^n+27]; // Vincenzo Librandi, Nov 13 2010

Crossrefs

Cf. A000040, A157007.

Sequence in context: A102906 A178456 A069453 * A288616 A273547 A132240

Adjacent sequences: A104068 A104069 A104070 * A104072 A104073 A104074

Keyword

nonn

Author

Roger L. Bagula, Mar 02 2005

Status

approved