11687

This number is a composite.

+ 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]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell