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The product of first 421 positive even numbers minus 1, i.e., 2^421*421!-1 is the smallest titanic prime of form 2^p*p!-1, where p is a prime. [Loungrides]

 

  Submitted: 2016-06-16 11:29:03;   Last Modified: 2016-07-11 08:53:35.



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