OFFSET
1,1
COMMENTS
The next term, if one exists, is >100000. - Robert Price, Apr 25 2011
LINKS
EXAMPLE
10^3 - 81 = 919 which is a prime number.
MATHEMATICA
nMax=1000; Do[If[PrimeQ[10^n-81], Print[n]], {n, nMax}]
PROG
(PARI) is(n)=ispseudoprime(10^n-81) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert Price, Dec 21 2010
STATUS
approved