This number is a composite.

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The smallest brilliant number concatenated from two double-digit numbers ending with the same digit, i.e., 1121=19*59. Note that the prime factors of the brilliant number end also with another same digit, i.e., 9. [Loungrides]

Submitted: 2018-11-14 12:43:32;   Last Modified: 2019-08-19 09:36:12.
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