A289518 Primes of the form k!4+64, where k!4 is the quadruple factorial number (A007662).

67, 109, 3529, 10009, 65899, 151412689, 1267389649, 341094033905689, 9807130727058790189, 36453104912477522894689, 1008407509171875041482378189, 43350768819741354903275421016919057203189, 29366774490668885282893783501883117566129541193767295703189

Offset: 1

Author

Robert Price, Sep 02 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..16
• Henri& Renaud Lifchitz, PRP Records.Search for n!4+64.
• Joe McLean, Interesting Sources of Probable Primes
• OpenPFGW Project, Primality Tester

Crossrefs

Cf. A291347.

Programs

Mathematica

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 4] + 64, {i, 0, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n,1,-4]+64,{n,200}],PrimeQ] (* Harvey P. Dale, May 31 2020 *)