4231
This number is a prime.
The largest prime that can be formed by concatenating the first four positive integers. [Loungrides]
The 4231st prime number and the 4231st semiprime are the smallest such pair that together are pandigital. [Gaydos]
Prime number whose digits (in order) provide a solution to the following puzzle: Find __ * __ + __ - __ = 10, using the digits 1, 2, 3, and 4. [Stoffel]
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