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235235*2^70000-1, a 21078-digit prime number was, for a brief two-week period in late July and early August of 1989, the world's largest-known non-Mersenne prime. It was discovered by the "Amdahl Six" group of John Brown, Landon Curt Noll, Bodo K. Parady, Gene Ward Smith, Joel F. Smith, and Sergio E Zarantonello. [Dobb]


  Submitted: 2002-04-21 18:07:00;   Last Modified: 2008-01-30 11:28:00.

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