A154935 Numbers n such that n^7-2 is prime.

7, 15, 25, 87, 91, 99, 199, 211, 265, 337, 357, 361, 367, 405, 501, 511, 537, 595, 627, 685, 697, 771, 805, 841, 847, 861, 889, 931, 939, 979, 1035, 1047, 1081, 1125, 1135, 1177, 1225, 1231, 1287, 1315, 1321, 1387, 1425, 1497, 1501, 1627, 1741, 1795, 1807

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Jan 17 2009

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A028870, A038599, A154831, A154832, A154833, A154834, A154933, A154934.

Programs

Magma

[n: n in [1..500]|IsPrime(n^7-2)]; // Vincenzo Librandi, Nov 26 2010

Mathematica

lst={};Do[p=n^7-2;If[PrimeQ[p],AppendTo[lst,n]],{n,0,7!}];lst
Select[Range[2*10^3], PrimeQ[#^7 - 2] &] (* Vincenzo Librandi, Mar 20 2014 *)

PARI

is(n)=isprime(n^7-2) \\ Charles R Greathouse IV, Feb 17 2017