I've always been fascinated by numbers and parts of mathematics. Mostly science concerning relativity, infinity, quantum mechanics, nature, physics and whatnot. One of the coolest concepts, is a 'countable' (or some would say 'listable') number used to solve a math problem. It's the biggest number ever actually to be used in a math problem and your mind would literally collapse into a black hole if you think of the complete number. We know the last number is 7, I guess that's something.