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156 = (pi(1) + pi(5) + pi(6)) * (prime(1)+prime(5)+prime(6)). Note that 156 is the smallest and only even number with this property. [Firoozbakht]

 

  Submitted: 2004-08-16 07:02:44;   Last Modified: 2008-01-30 11:28:00.



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