A288609 Primes of the form k!6+4, where k!6 is the sextuple factorial number (A085158).
5, 7, 11, 31, 59, 409, 1733, 229639, 21827579, 131527051677179, 606997343490162629, 12604484198222791879, 32799650788086796039050629, 1140711996797519078728387466879, 7575339494576348459668940121110928768987796879
Offset: 1
Keywords
Links
- Robert Price, Table of n, a(n) for n = 1..23
- Henri& Renaud Lifchitz, PRP Records.Search for n!6+4.
- Joe McLean, Interesting Sources of Probable Primes
- OpenPFGW Project, Primality Tester
Crossrefs
Cf. A287914.
Programs
-
Mathematica
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]]; Select[Table[MultiFactorial[i, 6] + 4, {i, 0, 100}], PrimeQ[#]&]