How far can you go in TGE before floating point accuracy problems

My game starts at

1317.78 -201.752 325.95


and the farthest interior instance is located at:

5668.9 14133.9 313.918


Can I operate within these ranges without having floating point accuracy problems?

I don't have a lot of models in the game....lots of open space, but you are required to travel to
5668.9 14133.9 313.918

and I just want to make sure that when people get there, they are not falling through terrains or buildings.

In my tests everything is fine but I just wanted to make sure I won't run into problems on other systems.

These ranges are safe, yes? (I do realize terrain has repeated itself in terms of lightmaps, etc. I just want to make sure I'm not going to run into Math problems engine wise)