A288609 - OEIS

A288609

Primes of the form k!6+4, where k!6 is the sextuple factorial number (A085158).

%I #7 Jun 11 2017 20:56:11

%S 5,7,11,31,59,409,1733,229639,21827579,131527051677179,

%T 606997343490162629,12604484198222791879,32799650788086796039050629,

%U 1140711996797519078728387466879,7575339494576348459668940121110928768987796879

%N Primes of the form k!6+4, where k!6 is the sextuple factorial number (A085158).

%H Robert Price, <a href="/A288609/b288609.txt">Table of n, a(n) for n = 1..23</a>

%H Henri& Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n6+4&action=Search">PRP Records.Search for n!6+4.</a>

%H Joe McLean, <a href="http://web.archive.org/web/20091027034731/http://uk.geocities.com/nassarawa%40btinternet.com/probprim2.htm">Interesting Sources of Probable Primes</a>

%H OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>

%t MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];

%t Select[Table[MultiFactorial[i, 6] + 4, {i, 0, 100}], PrimeQ[#]&]

%Y Cf. A287914.

%K nonn

%O 1,1

%A _Robert Price_, Jun 11 2017