A243432 Primes of the form 2^n + 47.

79, 822752278660603021077484591278675252491367932816789931674304559

Offset: 1

Author

Vincenzo Librandi, Jun 05 2014

Keywords

• nonn
• bref

Comments

The next term has 316 digits (see b-file).

Associated n: 5, 209, 1049.

Also a probable prime for n = 8501 and no others below 10^5. - Jens Kruse Andersen, Jun 30 2014

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..3

Crossrefs

Cf. similar sequences listed in A243429.

Programs

Magma

[a: n in [0..600] | IsPrime(a) where a is 2^n+47];

Mathematica

Select[Table[2^n + 47, {n, 0, 600}], PrimeQ]