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Numbers n such that 5^n + 6 is prime.
4

%I #12 May 22 2017 11:49:44

%S 0,1,2,3,4,13,88,177,184,297,304,310,562,892,1300,4047,5557,9028,

%T 15597,28527,56890,77485,79378

%N Numbers n such that 5^n + 6 is prime.

%C a(24) > 10^5. - _Robert Price_, Feb 03 2014

%e 5^13 = 1220703131 a prime number

%o (PARI) is(n)=ispseudoprime(5^n+6) \\ _Charles R Greathouse IV_, May 22 2017

%K nonn

%O 1,3

%A Herman H. Rosenfeld (herm3(AT)pacbell.net), Dec 20 2003

%E More terms from _Ray Chandler_, Dec 24 2003

%E a(1) = 0 added by _Robert Price_, Feb 03 2014

%E a(17)-a(23) from _Robert Price_, Feb 03 2014