The book is now available! 3
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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Uniquely, 3 is the only prime whose powers (greater than 1) all have a digital root which is its own square. The simple proof is a direct consequence of the divisibility rule. [King]


  Submitted: 2010-02-05 10:15:04;   Last Modified: 2010-02-05 11:25:29.

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