OFFSET
1,2
COMMENTS
The value corresponding to n=7180 was certified a Fermat and Lucas PRP with WinPFGW and submitted to Lifchitz's Top PRPs database.
PROG
(PARI) is(n)=ispseudoprime(10^n*(3+7*10^n)+7) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Jason Earls, Dec 18 2009
STATUS
approved