OFFSET
1,3
COMMENTS
Values corresponding to n=5638 and n=7271 were both certified Fermat and Lucas PRPs with WinPFGW and submitted to Lifchitz's Top PRPs database.
PROG
(PARI) is(n)=ispseudoprime(10^n*(7+3*10^n)+3) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Jason Earls, Dec 14 2009
STATUS
approved