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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
290, 2430, 5012, 4680, 794, 2574, 26000, 3948, 18056, 10974 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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

Table of n, a(n) for n=1..10.

Wikipedia, RSA-2048

CROSSREFS

Cf. A108375, A108573.

Sequence in context: A075299 A031712 A251049 * A186547 A237741 A335613

Adjacent sequences:  A108878 A108879 A108880 * A108882 A108883 A108884

KEYWORD

more,nonn

AUTHOR

Jason Earls, Jul 14 2005

STATUS

approved

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Last modified October 24 20:35 EDT 2021. Contains 348233 sequences. (Running on oeis4.)