User blog comment:Superman37891/PEPTO BISMOL/@comment-30754445-20170427172623/@comment-30754445-20170428085639

There are many ways to "inject" a specific large number into a hypothetical universe, and setting c=gongulus km/s is just another way of doing this. Following Pellucidar's idea, we could also have a universe with a gongulus different elementary particles. Or we could speak of our universe, when it becomes a gongulus years old.

None of this circumnavigates the issue of physics itself being limited by low-tetrational functions. The equation Denis gave has exponential growth, and plugging [some huge number] as a constant doesn't change that.