The book is now available! 1330
(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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There are 1330 sphenic numbers whose the prime factors are double-digit primes. May we call them “2-sphenic numbers”? [Loungrides]


  Submitted: 2015-05-03 14:18:04;   Last Modified: 2016-06-20 08:25:17.

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