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

347, 587, 65867, 4294967627, 18446744073709551947

Offset

1,1

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

Links

Table of n, a(n) for n=1..5.

Mathematica

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

Prog

(Magma) [a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+331];
(PARI) for(n=1, 6, if(ispseudoprime(t=2^2^n+331), print1(t", "))) \\ Charles R Greathouse IV, Jun 07 2016

Crossrefs

Cf. similar sequences listed in A273547.

Sequence in context: A287700 A281163 A059074 * A142907 A052163 A210363

Adjacent sequences: A273802 A273803 A273804 * A273806 A273807 A273808

Keyword

nonn

Author

Vincenzo Librandi, Jun 02 2016

Status

approved