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

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The difference between the sum of unitary divisors and the value of the Euler-phi function is iterated, and started at n and a(n) is the length of terminal cycle of iteration involving a high-frequency of the prime number 53. [Labos]


  Submitted: 2004-09-07 04:35:32;   Last Modified: 2008-01-30 11:28:00.

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