A220702 Numbers n such that n^5 + 5*n + 5^n is prime.

1, 2, 3, 4, 6, 19, 23, 63, 76, 508, 561, 839, 894, 1389, 2513, 3436, 6121, 7412, 8418, 9184

Offset: 1

Author

Vincenzo Librandi, Jan 07 2013

Keywords

• nonn

Crossrefs

Cf. A220511.

Programs

Mathematica

Select[Range[10000], PrimeQ[#^5 + 5*# + 5^#]&]

PARI

is(n)=ispseudoprime(n^5+5*n+5^n) \\ Charles R Greathouse IV, Jun 13 2017