1973

This number is a prime.

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The smallest diagonal prime with distinct digits. (A diagonal prime is a prime of n² digits (n > 1) arranged left-right, top-down, in a n-by-n matrix, where the diagonals are also prime in each direction). [Loungrides]

Submitted: 2009-02-17 10:57:41; Last Modified: 2026-01-25 15:02:13.