I think you might be off by a factor of 10. Alphanumeric would be at least 36 characters, which would imply 2.8 trillion combininations (36 ^ 8).

yeah, I was doing the charitable as possible version

Not seeing the problem. Are you assuming that somehow there is at most one Gmail account per person on earth?

I have… I’m not sure. Ten maybe? And those are actual conveniences for different purposes. I’m sure plenty of people have hundreds, if not thousands. So what?

I'm a bit confused:

- I charitably went with 208 billion, 25 for every single individual on this planet.

- As the other replies note, I chose a misleading number that is off by an order of magnitude at even the most charitable reading

- You can't see the problem

I don't think it's fair to you to assume you can't see it, maybe you were in an old tab that had my reply but none of the descendants.