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The number of prime quadruples, counting (3, 5, 7, 11), below one million. (A prime quadruple is four consecutive primes, such that the first and the last differ by 8. It has the form (p, p+2, p+6, p+8) for p > 3).


  Submitted: 2003-11-18 06:40:54;   Last Modified: 2009-02-20 21:22:08.

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