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According to the textbook "Elements of Number Theory" by Pettofrezzo and Byrkit, the largest known twin prime pair in 1975 was {140737488353699, 140737488353701}. The lesser element in the succeeding twin prime pair after a computer algebra system (CAS) calculator search encompassing in excess of five dozen primes is 140737488356207. Of course, such a fifteen-digit integer was quite a challenge for the technology available then. [Schiffman]

 

  Submitted: 2010-10-30 10:07:36;   Last Modified: 2010-11-05 18:12:35.



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