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389 and 17 are primes, as is their concatenation (38917). Inserting the lowly 0 between them transforms the prime into a power, i.e. 389017, the cube of 73, a prime itself. [Trotter]

 

  Submitted: 2001-07-22 20:39:17;   Last Modified: 2008-01-30 11:28:00.



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