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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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The only known number n such that the sum of the proper divisors of n is equal to phi(n). [Firoozbakht]

 

  Submitted: 2008-01-12 06:27:54;   Last Modified: 2008-01-30 11:28:00.



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