1237

This number is a prime.

Just showing those entries submitted by 'Loungrides': (Click here to show all)

+ The smallest four-digit emirp with distinct digits. Note that the sum of its digits is equal to the smallest double-digit emirp. [Loungrides]

+ The smallest distinct-digit "extra" center-deletable prime (emirp), i.e., deleting the central double-digit prime, (23), another double-digit prime remains. [Loungrides]

(There is one curio for this number that has not yet been approved by an editor.)

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