Use CUDA to give me a set of functions

This is an Urgent project, so I will give preference to those who commit to do it faster. Give me set of modulo arithmetic operation functions to be run on GPU. I will use your your function in my algorithm. The main requirement is that the operations should work on very very large numbers . There are many references on internet. Let us discuss and I will give you some hints and my equivalent C++ program, that you can use as starting point (if you want). If you don't have GPU access, I will provide you access on my PC.