On Thu, Jan 5, 2017 at 3:51 PM, Henson wrote:

Ok! I have mistake the correct number. Really the number is Irrational and the problem is the values are Infinity but How I work with BigFloat precision for Arbitrary numbers in Haskell?!

I need get the values for arbitrary precision numbers in haskell about samples posted not is better implementation for that because range of double implemented in various languages.

The correct question here about that is How to resolve that problem?!

I need get three last digits for arbitrary numbers and after search in various places not found response for that.

If exists any material about that but not only for explanations about Floats and Doubles it's a good start for resolve question.

I haven't used it, but this package looks like it might help in your situation: http://hackage.haskell.org/package/cyclotomic