%I #4 Dec 15 2017 17:36:51
%S 290,2430,5012,4680,794,2574,26000,3948,18056,10974
%N Least positive k such that k * [RSA2048]^n + 1 is prime, where RSA2048 is the 617 decimal digit RSA challenge number.
%C Another term is a(16)=6766. All values in the sequence are Fermat and Lucas PRPs except for the first which was proved with ECM. The larger values won't be easily provable until RSA2048 is factored, which has a prize of $200000 for its factorization.
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/RSA2048">RSA2048</a>
%Y Cf. A108375, A108573.
%K more,nonn
%O 1,1
%A _Jason Earls_, Jul 14 2005
