A273809 Primes of the form 2^(2^n) + 487.

491, 503, 743, 4294967783, 115792089237316195423570985008687907853269984665640564039457584007913129640423

Offset: 1

Author

Vincenzo Librandi, Jun 03 2016

Keywords

• nonn

Comments

Terms given correspond to n = 1, 2, 3, 5 and 8.

Next term >= 2^2^35 + 487. - 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)+487];

Mathematica

Select[Table[2^(2^n) + 487, {n, 0, 15}], PrimeQ]

PARI

for(n=0,8, if(ispseudoprime(t=2^2^n+357), print1(t", "))) \\ Charles R Greathouse IV, Jun 07 2016