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14131Generalised factorial primes??

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  • julienbenney
    Dec 5, 2003
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      Using the ordinary equipment on my old home computer, I found that (13!
      + 2)/2 is prime.

      How many primes of the form (a! + n)/n [or (a! - n)/n] are actually
      known? Do you think there might by many to be found??
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