1297

This number is a prime.

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This is the smallest 4-digit prime that produces 5 other primes by changing only its first digit (i.e., 2297, 4297, 5297, 7297, 8297 are primes). [Opao]

Submitted: 2004-02-22 13:07:32; Last Modified: 2008-01-30 17:28:00.