%I #8 Feb 06 2024 17:43:09
%S 7,97,937,654729067,13113070457687988603440617,
%T 563862029680583509947946867,
%U 536347102817482913555411512425352545980058003572241486357421867,352999527454840466971061863960307904899505075341088595453568994140617
%N Primes of the form k!2-8, where k!2 is the double factorial number (A006882).
%H Robert Price, <a href="/A289851/b289851.txt">Table of n, a(n) for n = 1..10</a>
%H Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n2-8&action=Search">PRP Records.Search for n!2-8.</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, 2] - 8, {i, 5, 100}], PrimeQ[#]&]
%t Select[Range[5,100]!!-8,PrimeQ] (* _Harvey P. Dale_, Feb 06 2024 *)
%Y Cf. A259359.
%K nonn
%O 1,1
%A _Robert Price_, Jul 13 2017
%E Definition corrected by _Harvey P. Dale_, Feb 06 2024