56

This number is a composite.

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The smallest number that can be expressed as a sum of two distinct primes, each ending with the digit 3, in two different ways (56 = 3 + 53 = 13 + 43). [Sladcik]

Submitted: 2004-09-14 16:55:09; Last Modified: 2011-09-23 11:43:12.