Comprehension is a weird thing to define.

Like I know what 100 billion is. I can define it, I can say what’s less or more than it. Is that comprehension?

You could take three counters and throw them on a table in front of me and I could intuitively tell you there are 3 counters without individually counting each one. If you threw 20 counters on the table I would have to count all of them individually before I could tell you how many there are. Is that comprehension?

In my opinion any number that could be uniquely described counts as being comprehended by a human. For example I think people can grasp the concept of pi despite not being able to really grasp the infinite nature of it. So any number large enough where you couldn’t uniquely describe it to a person. Which is a pretty useless definition if we’re being honest.