641

This number is a prime.

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The largest sexy prime quadruplet less than a thousand starts at 641. I.e., 641+6, 641+6+6, and 641+6+6+6, are also prime. [Opao]

Submitted: 2004-01-25 02:50:07;   Last Modified: 2012-04-03 11:59:21.
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