# 7573

This number is a prime.

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(7573, 7577) is the only pair of primes formed from an
odd-digit double-digit composite number, i.e., 75, by
concatenating it with its previous and with its next odd
numbers, i.e.,73 and 77. [Loungrides]
Submitted: 2020-04-14 05:32:25; Last Modified: 2020-04-14 11:03:47.

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