25121

This number is a prime.

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The smallest prime concatenated from the squares of the terms of a pair of Brown numbers, i.e., (11, 5). Note that 5^2=25, 11^2=121 and 25121 is prime. [Loungrides]

Submitted: 2010-07-16 17:23:08; Last Modified: 2021-01-21 16:50:32.