Running ghci under OSX I am seeing the following behavior:

Prelude> 2^750000

{... lots of digits...}

Prelude> 2^760000

Segmentation Fault: 11

Prelude> 2^770000

Bus Error: 10

and I'm curious why this happens.

More details:

$ ghci --version

The Glorious Glasgow Haskell Compilation System, version 7.8.3

I'm using the 64-bit version of the Haskell Platform (x86_64-darwin-7.8.3).