

A180627


Numbers k such that 6*k!  1 is prime.


10




OFFSET

1,3


COMMENTS

Tested to 4400.  Robert G. Wilson v, Sep 28 2010
a(11) > 6300.  Jinyuan Wang, Feb 04 2020


LINKS

Table of n, a(n) for n=1..10.
Index entries for sequences related to numbers of primes of the form k*n!+1


MATHEMATICA

fQ[n_] := PrimeQ[6 n!  1]; k = 0; lst = {}; While[k < 1501, If[ fQ@k, AppendTo[lst, k]; Print@k]; k++ ]; lst


PROG

(PARI) is(k) = ispseudoprime(6*k!1); \\ Jinyuan Wang, Feb 04 2020


CROSSREFS

Cf. A002982, A076133, A076134, A099350, A099351, A180628, A180630, A180630, A180631.
Sequence in context: A214842 A299517 A268660 * A264860 A061354 A162709
Adjacent sequences: A180624 A180625 A180626 * A180628 A180629 A180630


KEYWORD

nonn,more


AUTHOR

Robert G. Wilson v, Sep 13 2010


EXTENSIONS

a(10) from Robert G. Wilson v, Sep 28 2010


STATUS

approved



