3719

This number is a prime.

+ The smallest emirp formed by using all end digits of multidigit primes. [Tough]

+ The largest of four emirps each formed from two double-digit primes. The others are 1723, 1753, and 1789. [Loungrides]

+ The Gregorian year will not fall one day behind until the year 3719. [Jackson]

(There are 4 curios for this number that have not yet been approved by an editor.)

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