A289564 Primes of the form k!4+512, where k!4 is the quadruple factorial number (A007662).
557, 743, 1097, 10457, 66347, 209357, 151413137, 1267390097, 4996617137, 44358635987, 2442358029135994033940387, 654019644904558303836431802744185605453637, 7767791322531438974665300521192692435966766137
Offset: 1
Keywords
Links
- Robert Price, Table of n, a(n) for n = 1..16
- Henri& Renaud Lifchitz, PRP Records.Search for n!4+512.
- Joe McLean, Interesting Sources of Probable Primes
- OpenPFGW Project, Primality Tester
Crossrefs
Cf. A291350.
Programs
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Mathematica
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]]; Select[Table[MultiFactorial[i, 4] + 512, {i, 0, 100}], PrimeQ[#]&] Select[Table[Times@@Range[n,1,-4]+512,{n,200}],PrimeQ] (* Harvey P. Dale, Aug 02 2022 *)
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