1353
This number is a composite.
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1353 is composite, but at least 13 and 53 are both prime.
Note that 13 + 14 + 15 + ... + 52 + 53 = 1353. [Ryden]
Submitted: 1999-09-02 23:40:00; Last Modified: 2008-01-30 17:28:00.
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