OFFSET
1,3
COMMENTS
a(29) > 5800. - Jinyuan Wang, Feb 05 2020
a(30) > 12000. - Michael S. Branicky, Jul 04 2024
EXAMPLE
k = 3 is here because 6*3! + 1 = 37 is prime.
PROG
(PARI) is(k) = ispseudoprime(6*k!+1); \\ Jinyuan Wang, Feb 05 2020
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Phillip L. Poplin (plpoplin(AT)bellsouth.net), Oct 25 2002
EXTENSIONS
a(26) inserted by and a(29) from Michael S. Branicky, Jul 03 2024
STATUS
approved