A243431 Primes of the form 2^n + 45.

47, 53, 61, 109, 173, 557, 1069, 8237, 65581, 134217773, 2147483693, 549755813933, 4835703278458516698824749, 19342813113834066795298861, 170141183460469231731687303715884105773, 2854495385411919762116571938898990272765493293

Offset: 1

Author

Vincenzo Librandi, Jun 05 2014

Keywords

• nonn

Comments

Associated n: 1, 3, 4, 6, 7, 9, 10, 13, 16, 27, 31, 39, 82, 84, 127, 151, 156, 163, 280, 306, ...

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..27

Crossrefs

Cf. similar sequences listed in A243429.

Programs

Magma

[a: n in [0..500] | IsPrime(a) where a is 2^n+45];

Mathematica

Select[Table[2^n + 45, {n, 0, 500}], PrimeQ]