OFFSET
1,2
COMMENTS
a(21) > 10^5.
MATHEMATICA
Select[Range[0, 100000], PrimeQ[6^n + 5^(n + 1)] &]
PROG
(PARI) is(n)=ispseudoprime(6^n + 5^(n+1)) \\ Charles R Greathouse IV, Jun 10 2016
(PFGW) ABC2 6^$a + 5^($a+1)
a: from 1 to 100000
Charles R Greathouse IV, Jun 10 2016
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Robert Price, Jun 10 2016
STATUS
approved