739

This number is a prime.

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The only 3-digit prime (emirp) that remains prime when its leading digit is replaced by any digit that is equal to a power of 2, i.e., 1, 2, 4, 8. [Loungrides]

Submitted: 2010-11-28 19:40:38; Last Modified: 2020-07-21 16:29:38.