5

This number is a prime.

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Using one each of 2^a and 3^b, 5 = 1+4 = 2+3 = 8-3 = 9-4 = 32-27 for five different ways. [Bergot]

Submitted: 2018-05-11 12:18:22;   Last Modified: 2018-05-11 13:43:48.
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