5237

This number is a prime.

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The smallest of only two primes, with all distinct prime digits, that are formed by concatenating a double-digit number with a pair of double-digit emirps. The other prime is 5273. [Loungrides]

The only distinct-digit prime consisted of all the prime digits only, that remains prime by inserting zeros in between its digits, i.e., 5020307 is prime. [Loungrides]

The smallest prime of the "commas sequence" consisting of only prime digits. Note that it is the only such prime that consists of all the distinct prime digits. [Loungrides]