6263

This number is a prime.

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The only prime concatenated from two successive double-digit composite numbers, i.e., (62, 63), each formed from the product 6, of the first two prime digits, (2, 3), followed by each of them. [Loungrides]

Submitted: 2017-06-27 04:39:55; Last Modified: 2021-06-19 13:48:22.