OFFSET
1,1
PROG
(PARI) isok(n) = isprime(n) && (fn = ((n-1)! + 1)) && ((fn % (n+2)) == 1) && ((fn % (n+4)) == 1) && ((fn % (n+6)) == 1) && ((fn % (n+8)) == 1) && ((fn % (n+10)) == 1) && ((fn % (n+12)) == 1); \\ Michel Marcus, Dec 31 2013
CROSSREFS
KEYWORD
dead
AUTHOR
EXTENSIONS
More terms from Michel Marcus, Dec 31 2013
STATUS
approved