2689

This number is a prime.

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Concatenate (right-to-left) the 2nd, 6th, 8th, and 9th prime and you will get another prime, i.e., 2319133. [Bopardikar]

Submitted: 2011-12-03 08:07:30;   Last Modified: 2011-12-03 09:16:00.
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