How to express infinity in Prolog?

I am trying to use random/3

random(+L:int, +U:int, -R:int)

Is there any thing that can be used for representing infinity?

For Example:

random(0, Infinity, Random_Number).

Is it possible to achieve this with random? Or is there any other simple alternative?

P.S. I have made clpfd programs where I have used sup ( Supremum ), but I am not working with clpfd.