Board Thread:General Discussion/@comment-45452715-20200411082456/@comment-9605025-20200411152606

My guess is it is a limit of the program. The game probably uses a double-precision floating point number to keep track of the stat and beyond a certain point, the number will lose precision. from Wikipedia:

The 11 bit width of the exponent allows the representation of numbers between 10−308 and 10308, with full 15–17 decimal digits precision. By compromising precision, the subnormal representation allows even smaller values up to about 5 × 10−324. - Edit:

Take a look at this page from Massachusetts Institute of Technology regarding double-precision floating points. The value you mentioned is the limit of that particular data type.