This number is a prime.

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+ The smallest prime number that is a substring of the concatenation, in either order, of the next two primes (331 and 317). The next four such primes are 111091, 777781, 1131113, and 3333313. [Gaydos]

+ There are 313 even digits in the first 313 prime numbers. [Gaydos]

(There are 2 curios for this number that have not yet been approved by an editor.)

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