A288716 Primes of the form k!8+2, where k!8 is the octuple factorial number (A114800).

3, 5, 7, 11, 67, 107, 1367, 2417, 16931, 126227, 592517, 65909027, 3493178327, 7547514977, 14454403427, 385235284982627, 2667042724170827, 98523573068265783062627, 121598818552526868243555286516922298627484453127

Offset: 1

Author

Robert Price, Jun 13 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..25
• Henri& Renaud Lifchitz, PRP Records.Search for n!8+2.
• Joe McLean, Interesting Sources of Probable Primes
• OpenPFGW Project, Primality Tester

Crossrefs

Cf. A204663.

Programs

Mathematica

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 8] + 2, {i, 0, 100}], PrimeQ[#]&]