2917
This number is a prime.
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The smallest of only two primes of form n^2 + 1 that is concatenated from two double-digit primes, i.e., 54^2+1 = 2917. (The other is 3137 = 56^2+1). [Loungrides]
Submitted: 2012-07-20 05:16:19; Last Modified: 2013-05-26 15:28:02.
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