A289519 Primes of the form k!4+128, where k!4 is the quadruple factorial number (A007662).

131, 149, 173, 359, 3593, 65963, 151412753, 184874815253, 675141445011750931735785863483259503, 13075173582607657311300240428800205506303238072109503, 12956907789303111531153065870401861366351857094178052776930473828253

Offset: 1

Author

Robert Price, Sep 02 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..12
• Henri& Renaud Lifchitz, PRP Records.Search for n!4+128.
• Joe McLean, Interesting Sources of Probable Primes
• OpenPFGW Project, Primality Tester

Crossrefs

Cf. A291348.

Programs

Mathematica

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 4] + 128, {i, 0, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n,1,-4]+128,{n,200}],PrimeQ] (* Harvey P. Dale, Aug 13 2023 *)