A104071 Primes of the form 2^k + 27.
29, 31, 43, 59, 283, 1051, 8219, 16411, 65563, 1099511627803, 2199023255579, 17592186044443, 77371252455336267181195291, 1298074214633706907132624082305051
Offset: 1
Keywords
Programs
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Magma
[ a: n in [0..750] | IsPrime(a) where a is 2^n+27]; // Vincenzo Librandi, Nov 13 2010
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Mathematica
a = Delete[Union[Flatten[Table[If [PrimeQ[2^n + 27] == True, 2^n + 27, 0], {n, 1, 400}]]], 1]
Formula
a(n) = 2^A157007(n) + 27. - Elmo R. Oliveira, Nov 08 2023