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A216668 Smallest integer b > 1 such that for all primes p <= prime(n), (b+1)^p - b^p is prime if and only if 2^p-1 is prime. 1
2, 2, 2, 296, 296, 369719, 457578, 43410300320, 43410300320, 43410300320, 288975248496 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Cf. A216666.
Sequence in context: A304463 A066736 A324302 * A057330 A207820 A186069
KEYWORD
nonn,hard,more
AUTHOR
Jean-Louis Charton, Sep 13 2012
EXTENSIONS
a(11) from Jean-Louis Charton, Oct 03 2012
STATUS
approved

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)