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

290, 2430, 5012, 4680, 794, 2574, 26000, 3948, 18056, 10974

Offset: 1

Author

Jason Earls, Jul 14 2005

Keywords

• more
• nonn

Comments

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.

Links

• Wikipedia, RSA-2048

Crossrefs

Cf. A108375, A108573.