2717
This number is a composite.
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The only 2-sphenic number (2717 = 11 x 13 x 19) concatenated from two double-digit numbers (c;n) showing that c is the nth composite number, i.e., 27 is the 17th composite number. [Loungrides]
Submitted: 2020-04-02 05:11:24; Last Modified: 2020-07-23 04:31:20.
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