An aside is that I'm writing the application in Delphi 5, and the maximum native supported integer sizes are 32bit unsigned, and 64bit signed.. I've been writing a math library of my own in assembler that at compile time will allow you to specify the maximum bitsize you want it to support, but this is proving to be a mind-numbing task.. ;) If anyone is familiar with Delphi and has any libraries like this already, I'd much appreciate hearing about them..

The library I like most is HIT - http://www.znz.freesurf.fr; it's not free though. You could also find a good one at http://ace.ulyssis.org/~triade/GInt/index.htm - it's the one recommended by the writer of DCPCrypt (Dave Barton). [See www.scramdisk.clara.net ] Mark