A243432 - OEIS

%I #16 Sep 08 2022 08:46:08

%S 79,822752278660603021077484591278675252491367932816789931674304559

%N Primes of the form 2^n + 47.

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

%C Associated n: 5, 209, 1049.

%C Also a probable prime for n = 8501 and no others below 10^5. - _Jens Kruse Andersen_, Jun 30 2014

%H Vincenzo Librandi, <a href="/A243432/b243432.txt">Table of n, a(n) for n = 1..3</a>

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

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

%Y Cf. similar sequences listed in A243429.

%K nonn,bref

%O 1,1

%A _Vincenzo Librandi_, Jun 05 2014