202129

This number is a prime.

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A prime that is a concatenation of elements of a primitive Pythagorean triple (20,21,29). Note that 29 is a prime and so are 212029, 292021, and 202921. This is the smallest prime having this property. [Jevtic]

Submitted: 2010-01-09 13:43:19; Last Modified: 2010-01-09 13:55:32.