This number is a composite.

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2^2004 + 823 is prime. It is the smallest prime of form 2^2004 + k. (Sent to "Prime Curios!" as a Happy New Year prime in 2004). [Cino]

Submitted: 2004-01-02 21:21:43;   Last Modified: 2014-08-30 10:16:45.
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