7

This number is a prime.

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7 is the only prime in which a/b + c/d + e/f = a/b * c/d * e/f, where the variables a through f represent any nonzero single-digit numbers. [Morse]

Submitted: 2008-03-23 10:24:41;   Last Modified: 2009-09-14 10:41:14.
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