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The nth Prime Page will now find any of the first 2.623˙1015 primes or π(x) for x up to 1017.

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The smallest number n such that neither n!+1 nor n!-1 is prime. [Silva]


  Submitted: 2009-06-24 18:52:02;   Last Modified: 2009-06-24 20:32:11.

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