This number is a prime.

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+ The prime 12343 was found by Languasco and Zaccagnini who have studied 12343 independent relations over a total number of 17453 ones while computing the Mertens and Meissel-Mertens constants for sums over arithmetic progressions. Note that 17443 and the reversal of 12343 are both semiprimes. [Post]

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