OFFSET
1,2
COMMENTS
No more terms up to n=7500.
PROG
(PARI) is(n)=ispseudoprime(10^n*(2+7*10^n)+7) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Jason Earls, Dec 17 2009
STATUS
approved