2

This number is a prime.

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Logicians Bertrand Russell (1872-1970) and Alfred Whitehead (1861-1947) went to great lengths to prove that 1 + 1 = 2, in their epochal Principia Mathematica.

Submitted: 2008-02-07 04:37:22; Last Modified: 2008-02-07 04:39:38.