OFFSET
1,3
COMMENTS
No further terms < 100000. - Ray Chandler, Jul 30 2011
a(8) > 2*10^5. - Robert Price, May 11 2014
EXAMPLE
11^5 + 2 = 161053 is prime, hence 5 is a term.
MATHEMATICA
Do[If[PrimeQ[11^n + 2], Print[n]], {n, 0, 5000}]
PROG
(PARI) is(n)=isprime(11^n+2) \\ Charles R Greathouse IV, Feb 17 2017
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Ryan Propper, Jun 17 2005
EXTENSIONS
8273 from Jason Earls, Feb 29 2008
Edited by N. J. A. Sloane, Mar 02 2008
a(7) from Robert Price, May 11 2014
a(8) from Paul Bourdelais, Aug 02 2023
STATUS
approved