A274023 Primes of the form 2^(2^k) + 13.

17, 29, 269, 18446744073709551629

Offset: 1

Author

Vincenzo Librandi, Jun 07 2016

Keywords

• nonn

Comments

Terms given correspond to k = 1, 2, 3 and 6.

Next term >= 2^2^39 + 13. - Charles R Greathouse IV, Jun 08 2016

Crossrefs

Cf. A019434, A104067, A130730, A274022.

Cf. similar sequences listed in A273547.

Programs

Magma

[a: n in [0..10] | IsPrime(a) where a is 2^(2^n)+13];

Mathematica

Select[Table[2^(2^n) + 13, {n, 0, 15}], PrimeQ]

PARI

for(n=1,6, if(ispseudoprime(t=2^2^n+13), print1(t", "))) \\ Charles R Greathouse IV, Jun 08 2016