The book is now available! 149
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149 is prime, but 1149, 2149, ..., 9149 are all composite. This is the smallest excluding two trivial prime numbers 2 and 5. [Poo Sung]

 

  Submitted: 2009-06-08 13:01:10;   Last Modified: 2009-06-08 19:22:54.



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