Depending on how you parse number literals, there are the examples at the end of http://arclanguage.org/item?id=10149 which I used for stress-testing ssyntax/number highlighting.
Just in case there are any that are useful, I also used http://pastebin.com/YqxZydyw to test syntax highlighting. A lot of the tests have to do with recognizing Scheme numeric literals, though.
