A105138 Numbers n such that 256n+129 is prime.

2, 4, 5, 10, 13, 17, 19, 25, 28, 37, 38, 40, 44, 47, 52, 53, 59, 62, 70, 74, 77, 79, 82, 83, 103, 110, 115, 119, 124, 130, 137, 140, 149, 152, 158, 170, 173, 178, 179, 193, 200, 205, 208, 209, 212, 217, 230, 235, 238, 242, 247, 248, 257, 268, 269, 272, 275, 280, 283, 299, 307

Offset: 1

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A095278, A105133-A105140, A002145, A007521, A105126-A105132.

Programs

Magma

[n: n in [0..350] | IsPrime(256*n+129)]; // Vincenzo Librandi, Jan 08 2013

Mathematica

Select[Range[0, 500], PrimeQ[256 # + 129]&] (* Vincenzo Librandi, Jan 08 2013 *)

PARI

is(n)=isprime(256*n+129) \\ Charles R Greathouse IV, Jun 12 2017