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250431285 * 23557 - 1 is both a titanic twin prime and a titanic Sophie Germain prime, since 250431285 * 23557 + 1 and 250431285 * 23558 - 1 are prime. [Broadhurst]

 

  Submitted: 2000-09-15 21:07:27;   Last Modified: 2008-07-18 09:38:28.



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