A273811 Primes of the form 2^(2^n) + 805.

809, 821, 1061, 4294968101, 18446744073709552421

Offset

1,1

Comments

Terms given correspond to n = 1, 2, 3, 5 and 6.

Next term >= 2^2^25 + 805. - Charles R Greathouse IV, Jun 07 2016

Links

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

Mathematica

Select[Table[2^(2^n) + 805, {n, 0, 15}], PrimeQ]

Prog

(Magma) [a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+805];
(PARI) for(n=1, 6, if(ispseudoprime(t=2^2^n+805), print1(t", "))) \\ Charles R Greathouse IV, Jun 07 2016

Crossrefs

Cf. similar sequences listed in A273547.

Sequence in context: A259959 A332180 A160034 * A252028 A031599 A265984

Adjacent sequences: A273808 A273809 A273810 * A273812 A273813 A273814

Keyword

nonn

Author

Vincenzo Librandi, Jun 03 2016

Status

approved