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A221637
Numbers n such that (15^n + 14^n)/29 is prime.
5
3, 127, 227, 1009, 1951, 5101, 14011
OFFSET
1,1
COMMENTS
All terms are prime.
a(8) > 10^5.
MATHEMATICA
Select[ Prime[ Range[1, 100000] ], PrimeQ[ (15^# + 14^#)/29 ]& ]
PROG
(PARI) is(n)=ispseudoprime((15^n+14^n)/29) \\ Charles R Greathouse IV, Feb 20 2017
KEYWORD
hard,nonn,more
AUTHOR
Robert Price, May 28 2013
STATUS
approved