The largest number you can think of

Whats the largest number you can think of?

As I child I had a dream. To start writing numbers in ascending order. Like start with 1, 2, 3, .... and go on as much as I can. Just to see how far I can go, if you know what I mean.

As a kid I believed that someday I would reach a point where counting further would be impossible. And I would be the first person to reach that number.

I haven't started yet. So much for my childhood dreams.