This number is a prime.

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The 4th prime, obtained by concatenating the odd primes alternately on the right and left of the even prime. The previous such primes are, 23, 523, 5237. [See PC523]. [Loungrides]

Submitted: 2012-10-07 11:56:40;   Last Modified: 2019-04-26 10:59:08.
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