319

This number is a composite.

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+ The smallest of only two 3-digit “extra brilliant numbers,” i.e., 319 = 11 * 29, 2911 = 41 * 71, 4171 = 43 * 97. [Loungrides]

+ The smallest 3-digit brilliant number, (319 = 29 * 11), whose the prime factors, (29, 11), create another brilliant number, 2911=41*71, and also the prime factors create a third brilliant number, i.e., 4171 = 43 * 97. We can say that 319 is the only odd-digit "extra brilliant number." [Loungrides]

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