My friend and I are wanting to build a computer for stritctly number crunching. (More specifially, finding a prime number for huge, huge numbers.) We will be making fast computers, plus try to get a distributing computer network too. (Other computers will share the CPU load.) So, my question is, what is the best type of computer to crunch numbers? 1. Pentium 4 2. AMD Athalon 64 bit 3. Dual Pentium Xeon/P4 4. Two computers with either AMD XP+ or Pentium 4? I'm just trying to figure out if I should go with a dual processor set up, which processor is the best, and/or if I should share the load between two different computers. Thanks for your help!