12343

This number is a prime.

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]

A "prime frequency" displayed digitally in the movie "Prime Risk," a thriller film directed by Michael Farkas.

123⁴+3 = 228886644 is a number containing the even digits with repetitions. The sequence of digits 12343 in the first member of the equality forms a prime number. [Leonardis]