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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