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A121931 Numbers n such that (n!)^8 + 1 is prime. 0
0, 1, 2, 58, 75, 347 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Corresponding primes of the form (n!)^8 + 1 are {2,2,257,...}.
a(7) > 7000. - Robert Price, Aug 26 2014
LINKS
MATHEMATICA
Do[f=(n!)^8+1; If[PrimeQ[f], Print[{n, f}]], {n, 1, 75}]
CROSSREFS
Sequence in context: A359242 A090743 A104494 * A343578 A156507 A285148
KEYWORD
more,nonn,hard
AUTHOR
Alexander Adamchuk, Sep 10 2006
EXTENSIONS
347 from Ryan Propper, Jan 03 2008
STATUS
approved

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Last modified March 4 23:31 EST 2024. Contains 370537 sequences. (Running on oeis4.)