6761
This number is a prime.
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The largest 4-digit prime which remains prime when 2 is added to any of its digits. I.e., 8761, 6961, 6781, and 6763 are primes. [Opao]
Submitted: 2004-02-23 08:42:10; Last Modified: 2008-01-30 17:28:00.
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