The book is now available! 15530
(another Prime Pages' Curiosity)
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Starting at 15530, there are more numbers with 3 prime factors (3-almost primes) than numbers with 2 prime factors (semiprimes). [Noe]

 

  Submitted: 2010-08-11 11:09:33;   Last Modified: 2011-02-10 14:52:23.



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