A288613 Primes of the form k!6+16, where k!6 is the sextuple factorial number (A085158).

17, 19, 23, 43, 71, 107, 421, 8521, 21521, 21827591, 49579091, 295540261, 42061737041, 104463111041, 131527051677191, 9531467484069295223586105103141, 1115181695636107541159574297065641, 20881494984250735169104758744498001297509736890641

Offset: 1

Author

Robert Price, Jun 11 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..20
• Henri& Renaud Lifchitz, PRP Records.Search for n!6+16.
• Joe McLean, Interesting Sources of Probable Primes
• OpenPFGW Project, Primality Tester

Crossrefs

Cf. A288444.

Programs

Mathematica

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 6] + 16, {i, 0, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n,1,-6]+16,{n,200}],PrimeQ] (* Harvey P. Dale, Sep 26 2023 *)