11687
This number is a composite.
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The only 2-sphenic number that can be represented as sum of
products of n pairs of first consecutive odd numbers,
(n=13), i.e., 1*3 + 5*7 + … + 49*51 = 11687 = 13 × 29 × 31. [Loungrides]
Submitted: 2018-05-04 05:42:12; Last Modified: 2018-05-04 10:51:36.
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