6481

This number is a prime.

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The only prime formed in two ways, from a double-digit prime p by replacing each of its digits with its square, (p=89), and from a 3-digit prime q by replacing each of its digits with its cube, (q=421). [Loungrides]

Submitted: 2013-04-21 09:15:59; Last Modified: 2018-08-05 01:39:01.