A273805 Primes of the form 2^(2^n) + 331.

347, 587, 65867, 4294967627, 18446744073709551947

Offset: 1

Author

Vincenzo Librandi, Jun 02 2016

Keywords

• nonn

Comments

Terms given correspond to n = 2, 3, 4, 5 and 6.

Next term >= 2^2^30 + 331. - Charles R Greathouse IV, Jun 07 2016

Crossrefs

Cf. similar sequences listed in A273547.

Programs

Magma

[a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+331];

Mathematica

Select[Table[2^(2^n) + 331, {n, 0, 15}], PrimeQ]

PARI

for(n=1,6, if(ispseudoprime(t=2^2^n+331), print1(t", "))) \\ Charles R Greathouse IV, Jun 07 2016