A126425 Primes of the form k^5-k-1.

29, 239, 1019, 3119, 99989, 161039, 759359, 1048559, 1419839, 2476079, 3199979, 4084079, 14348879, 17210339, 24299969, 45435389, 60466139, 164916179, 254803919, 312499949, 550731719, 1934917559, 2373046799, 3707398349

Offset: 1

Author

Artur Jasinski, Dec 26 2006

Keywords

• nonn

Comments

Every number give rest 29 when divided 30, rest 9 when divided 10, rest 4 when divided 5

Links

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

Crossrefs

Cf. A002327, A002328, A116581, A126420, A126421, A126422, A126423, A126424, A126426, A126427.

Programs

Mathematica

a = {}; Do[If[PrimeQ[x^5 - x - 1], AppendTo[a, x^5 - x - 1]], {x, 1, 100}]; a
Select[Table[k^5-k-1,{k,90}],PrimeQ] (* Harvey P. Dale, Apr 21 2024 *)

Formula

a(n) = A126426(A126427(n)). - Amiram Eldar, Mar 13 2020