%I #28 Feb 18 2024 09:07:21
%S 5,17,257,65537,795866110996400884391941,
%T 3402823669209384634633746074317682114560000000000000000000000000000000000000000000000000000000000000039
%N Smallest prime of the form (1 + k)^(2^n) + k.
%Y Cf. A285929, A286982, A287842.
%K nonn,less
%O 1,1
%A _Juri-Stepan Gerasimov_, May 12 2017