A273804 Primes of the form 2^(2^n) + 301.

317, 557, 65837, 4294967597, 115792089237316195423570985008687907853269984665640564039457584007913129640237

Offset

1,1

Comments

Terms given correspond to n = 2, 3, 4, 5 and 8.

Next term >= 2^2^23 + 301. - Charles R Greathouse IV, Jun 07 2016

Links

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

Mathematica

Select[Table[2^(2^n) + 301, {n, 0, 16}], PrimeQ]

Prog

(Magma) [a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+301];
(PARI) for(n=1, 20, if(ispseudoprime(t=2^2^n+301), print1(t", "))) \\ Charles R Greathouse IV, Jun 07 2016

Crossrefs

Cf. similar sequences listed in A273547.

Sequence in context: A142003 A064396 A243958 * A142130 A278279 A058002

Adjacent sequences: A273801 A273802 A273803 * A273805 A273806 A273807

Keyword

nonn

Author

Vincenzo Librandi, Jun 02 2016

Status

approved