Infinity is mentioned as the largest known value, but Infinity was not originaly made as a number, it was used as something philosophical.
Is it a googol ? A googolplex ? The Multiverse in plank lengths? The Inaccessable Cardinal ? A Barrelplexian ? The Structure of Everything ? Is it a scale we have not discovered yet? Or is it the square root of -1?
Find something that would be placed directly before infinity, or maybe even find a scale larger than infinty. Let us see what we can find for the biggest known value!