NOTE: the results you get from running makecfg.exe may differ if you run it from a Win9X shell or from the native boot-up DOS prompt. Make sure you run it in the environment you will be doing most of your fractint work from. Arbitrary precision - try zooming past about E+13 and see how ssllloooowwww it all becomes. Then try to get to E+89 or so. Yes, theoretically fractint can get you to about E+1600 but has anyone ever done it? .