A228573 Numbers n such that (17^n + 16^n)/33 is prime.

41, 97, 1459, 89227, 91837

Offset: 1

Author

Robert Price, Aug 25 2013

Keywords

• hard
• nonn
• more

Comments

All terms are primes.

a(6) > 10^5.

Crossrefs

Cf. A227170, A221637, A228558, A227046.

Programs

Mathematica

Select[ Prime[ Range[1, 100000] ], PrimeQ[ (17^# + 16^#)/33 ]& ]

PARI

is(n)=ispseudoprime((17^n+16^n)/33) \\ Charles R Greathouse IV, Jun 13 2017