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
Keywords
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
Crossrefs
Cf. A288447.
Programs
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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 *)