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

809, 821, 1061, 4294968101, 18446744073709552421

Offset: 1

Author

Vincenzo Librandi, Jun 03 2016

Keywords

• nonn

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

Crossrefs

Cf. similar sequences listed in A273547.

Programs

Magma

[a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+805];

Mathematica

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

PARI

for(n=1,6, if(ispseudoprime(t=2^2^n+805), print1(t", "))) \\ Charles R Greathouse IV, Jun 07 2016