13

This number is a prime.

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13+10(1+2+3+4+5+6+7+8+9+10+11) is prime for each and every summation from 1 to its twin prime pair 11. [Haddish]

Submitted: 2010-03-15 13:18:05;   Last Modified: 2010-03-17 08:19:29.
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