1992

This number is a composite.

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If you separate the digits of 1992 like 199 2, you have two primes. Note that 199 is the largest prime less than 2 hundred. Separation in the middle gives us 19 92, and 19 turned upside down along with 92 reversed are prime. [Trotter]

Submitted: 2001-05-29 22:43:12;   Last Modified: 2008-01-30 17:28:00.
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