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According to "The New Book of Prime Number Records," the product of the first 643 primes plus one is prime. This integer consists of 2038 digits and is known in MATHEMATICA as Euclid [643]. Also note that 643 is a prime. [Schiffman]


  Submitted: 2010-11-20 15:17:32;   Last Modified: 2010-12-06 08:34:30.

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