system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Graham's number + 1

If I take Graham's number and just add one have I just with very little effort come up with a larger number.
gpt
Yes you have. Which is why nobody claims that Graham's Number is the largest possible number. What they do state, however, is that Graham's Number is the largest known number which is used in a specific mathematical calculation.

If you can come up with a formula which legitimately requires you to use (Graham's Number + 1) as part of it, then you could claim that you have "discovered" a larger number.