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

17, 29, 269, 18446744073709551629

Offset

1,1

Comments

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

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

Links

Table of n, a(n) for n=1..4.

Mathematica

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

Prog

(Magma) [a: n in [0..10] | IsPrime(a) where a is 2^(2^n)+13];
(PARI) for(n=1, 6, if(ispseudoprime(t=2^2^n+13), print1(t", "))) \\ Charles R Greathouse IV, Jun 08 2016

Crossrefs

Cf. A019434, A104067, A130730, A274022.

Cf. similar sequences listed in A273547.

Sequence in context: A146744 A103304 A104067 * A146872 A146792 A124884

Adjacent sequences: A274020 A274021 A274022 * A274024 A274025 A274026

Keyword

nonn

Author

Vincenzo Librandi, Jun 07 2016

Status

approved