This number is a prime.
Just showing those entries submitted by 'Post': (Click here to show all)
The recently published AINUR (the Atlas of Images of Nuclear Rings) in the journal Monthly Notices of the Royal Astronomical Society covers 113 nuclear rings in 107 [also prime] different galaxies. [Post]
The number of associative binary operations on an 3-set, or the number of labeled semigroups with 3 elements. [Post]