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The smallest diagonal emirp. (A diagonal prime is a prime of n^2 digits (n > 1) arranged leftright, topdown in a nbyn matrix, where the diagonals are also prime in each direction). [Loungrides]
The smallest emirp whose alternate digits (1733) segregate and reunite to form two "daughter" emirps (13 ; 73). [Beedassy]
(There are 2 curios for this number that have not yet been approved by an editor.)
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