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%I #11 Feb 09 2020 04:03:07
%S 2,3,5,10,11,12,17,34,74,136,155,259,271,290,352,479,494,677,776,862,
%T 921,932,2211,3927,4688
%N Numbers k such that 5*k! + 1 is prime.
%C a(26) > 4700. - _Jinyuan Wang_, Feb 04 2020
%e k = 3 is here because 5*3! + 1 = 31 is prime.
%o (PARI) is(k) = ispseudoprime(5*k!+1); \\ _Jinyuan Wang_, Feb 04 2020
%Y Cf. A002981, A051915, A076679, A076680, A076682, A076683, A178488, A180626, A126896.
%K nonn,more
%O 1,1
%A Phillip L. Poplin (plpoplin(AT)bellsouth.net), Oct 25 2002
%E a(25) from _Jinyuan Wang_, Feb 04 2020
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