A288616 Primes of the form k!6+27, where k!6 is the sextuple factorial number (A085158).

29, 31, 43, 67, 251, 4507, 14107, 116507, 3727387, 536166427, 3863281304394304907431116800027, 448140631309739369262009548800027, 749208909436911824731413869422968832000027, 110882918596662950060249252674599387136000027

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..16

Henri& Renaud Lifchitz, PRP Records.Search for n!6+27.

Joe McLean, Interesting Sources of Probable Primes

OpenPFGW Project, Primality Tester

Mathematica

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 6] + 27, {i, 0, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n, 1, -6]+27, {n, 200}], PrimeQ] (* Harvey P. Dale, Apr 12 2022 *)

Crossrefs

Cf. A288447.

Sequence in context: A178456 A069453 A104071 * A273547 A132240 A132243

Adjacent sequences: A288613 A288614 A288615 * A288617 A288618 A288619

Keyword

nonn

Author

Robert Price, Jun 11 2017

Status

approved