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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 first 5 open-end aliquot sequences are the so-called "Lehmer five."


  Submitted: 2003-02-16 12:34:46;   Last Modified: 2009-05-07 15:50:52.

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