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A108881 Least positive k such that k * [RSA-2048]^n + 1 is prime, where RSA-2048 is the 617 decimal digit RSA challenge number. 0

%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 * [RSA-2048]^n + 1 is prime, where RSA-2048 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 RSA-2048 is factored, which has a prize of $200000 for its factorization.

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/RSA-2048">RSA-2048</a>

%Y Cf. A108375, A108573.

%K more,nonn

%O 1,1

%A _Jason Earls_, Jul 14 2005

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Last modified April 20 00:58 EDT 2024. Contains 371798 sequences. (Running on oeis4.)