A160030 Primes of the form 2^(2^k)+385.

389, 401, 641, 65921, 4294967681, 340282366920938463463374607431768211841

Offset: 1

Author

Cino Hilliard, Apr 30 2009

Keywords

• nonn

Comments

Terms given correspond to k= 1, 2, 3, 4, 5 and 7.

Next term >= 2^2^20 + 385. - Vincenzo Librandi, Jun 07 2016

Next term >= 2^2^33 + 385. - Charles R Greathouse IV, Jun 07 2016

Crossrefs

Cf. A019434, A160027, A160028, A160029, A160032, A160033, A160034.

Cf. similar sequences listed in A273547.

Programs

Magma

[a: n in [0..15] | IsPrime(a) where a is 2^(2^n)+385]; // Vincenzo Librandi, Jun 07 2016

Mathematica

Select[Table[2^(2^n) + 385, {n, 0, 20}], PrimeQ] (* Vincenzo Librandi, Jun 07 2016 *)

PARI

g(n,m) = for(x=0,n,y=2^(2^x)+m;if(ispseudoprime(y),print1(y",")))