We've finally gotten around to replacing our Integer type with a real bignum implementation. The bignum code was written by Isaac Dupree in wonderfully pure Haskell, and it was a snug fit for our needs. After stripping the Prelude dependency and hooking it up to the Integer interface, it worked without a hitch.
Let's try it out:
david@desktop:lhc$ cat HelloWorld.hs module Main where main = do print (2^150) print (3*10^13*299792458) david@desktop:lhc$ ./HelloWorld 1427247692705959881058285969449495136382746624 8993773740000000000000