3217
This number is a prime.
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(3217, 7213) is the only pair of primes formed from a double-digit number n, (n=37), by inserting the product of its digits in between the digits of the number n and in between the digits of the reversal of n. [Loungrides]
Submitted: 2011-07-02 10:20:47; Last Modified: 2011-10-17 11:47:46.
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