A125972 Numbers k for which k^15+k^14-1 is prime.

7, 26, 42, 49, 116, 130, 149, 159, 190, 277, 289, 295, 296, 310, 330, 334, 365, 386, 389, 406, 411, 419, 471, 492, 505, 541, 590, 602, 632, 687, 690, 704, 727, 770, 771, 804, 826, 844, 872, 882, 929, 949, 961, 1017, 1082, 1091, 1135, 1157, 1160, 1196, 1232, 1237

Offset: 1

Author

Artur Jasinski, Dec 14 2006

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000040, A045546, A125881-A125885, A125965-A125973.

Programs

Mathematica

Do[If[PrimeQ[x^15 + x^14 - 1], Print[x]], {x, 1, 600}]

PARI

is(n)=isprime(n^15+n^14-1) \\ Charles R Greathouse IV, May 15 2013

Extensions

More terms from Amiram Eldar, Mar 18 2020