A289759 Primes of the form k!8-2, where k!8 is the octuple factorial number (A114800).

2, 3, 5, 7, 31, 103, 151, 3823, 16927, 126223, 137227543, 76663738303, 475493443423, 1132114642884223, 232032717002861773, 494437513909964623, 8949366251999798623, 22043108115271868623, 30822262564469609858623, 29990243754746489604765373

Offset: 1

Author

Robert Price, Jul 11 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..32
• Henri & Renaud Lifchitz, PRP Records.Search for n!8-2.
• Joe McLean, Interesting Sources of Probable Primes
• OpenPFGW Project, Primality Tester

Crossrefs

Cf. A204664.

Programs

Mathematica

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 8] - 2, {i, 3, 100}], PrimeQ[#]&]