I don't usually need help in locating software, but I'm having a heck of a time tracking down a good open-source bit of software which solves integer programming problems using arbitrary precision! If I don't find one soon, I'll need to write it myself. Which I don't mind, but it's silly to reinvent the wheel. Besides, the sooner I finish my current math project, the sooner I can get back to physics projects. I'm using GLPK right now, and it's brilliant up to a point. I could hack on it to make it do what I want regarding big integers, but I prefer not to need to spend the time. So if someone knows about a quick solution, I would appreciate the help. BTW I have implemented a pure binary solver, but that's not exactly what I need. Not every variable is binary. I think I see a way to overcome this, but once again, I hate spending time on software if it's already available. But it must be free and open source. Thank you.