Let's say we cut a cube in half for 1 minute, every time we cut it half again we do it in half the time as the last one. So first cut then we wait 30 seconds for the next cut, 15 seconds for the next and so on. Once the minute is up the task is completed, the very last slab at the end of the cube is the smallest number in existence. It cannot be cut in half again otherwise the task could not be comleted. This is the number closest to zero.

There has to be a number closest to zero otherwise no number can come after it, so what's the biggest number? Lets say you cake that final slab at the end of the super task cube and clone it to create the same cube only using this slab. How ever many units of this slab are required to complete the cube is the biggest number which I'll be representing as ? from now on. This is the biggest single number in existence, anything after it starts a new sequence of numbers.

For example if you place another slab on top of this cube that number would be represented like (?+1). Infinity is simply the potential to go higher and isn't a number.

>?
>?+1....
>? biggest single number in existence
>all other numbers
>_ the number closest to zero which is the end of a supertask
>Zero