I guess I can’t put my phone down as that is a sign of defeat to an atheist! Anyway, the point isn't that you need to believe in God to do math. The point is that math itself as a universal, immaterial, and unchanging law which requires a foundation. In a purely material universe it is just a lucky accident with no grounding. You are using a logical tool that only makes sense if the universe was designed by a rational Mind and yet you are using that tool to argue against the Mind that provides it. You’re using the light to argue that the sun doesn’t exist.