253
This number is a composite.
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The only prime-digit brilliant number, (253 = 11 x 23), whose concatenations of prime factors in both orders, i.e., 1123 and 2311, are primes. [Loungrides]
Submitted: 2021-01-10 08:00:51; Last Modified: 2021-06-16 11:54:30.
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