255

This number is a composite.

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255 (3*5*17) is a sphenic number, i.e., the product of three distinct primes. The next sphenic number is 258 (2*3*43). Curiously, 32 + 53 + 1743 is prime. [Honaker]

Submitted: 2004-01-21 05:09:47;   Last Modified: 2019-10-20 15:03:38.
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