A288304 Primes of the form k!6+9, where k!6 is the sextuple factorial number (A085158).

11, 13, 233, 394249, 13404169, 24663654409, 311607296009, 1282510028809, 37455569511954513920009, 1717927167842495286476800009, 182100279791304500366540800009, 131285558488477016219820351299780608000009, 453537748960814664854433903259753397239152640000009

Offset: 1

Author

Robert Price, Jun 07 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..19
• Henri& Renaud Lifchitz, PRP Records.Search for n!6+9.
• Joe McLean, Interesting Sources of Probable Primes
• OpenPFGW Project, Primality Tester

Crossrefs

Cf. A288154.

Programs

Mathematica

MultiFactorial[n_,k_]:=If[n<1,1,n*MultiFactorial[n-k,k]];
Select[Table[MultiFactorial[i,6]+9, {i,0,100}], PrimeQ[#]&]