Once you've reached a certain page of a listing that uses the "Found at least {n} edits" syntax, it doesn't get any higher, because it's found the actual number of edits. At least one case is pretty easy to detect: when the total number of entries isn't divisible by the count per page, it's reached the end.

(There's still a case where the total actual number is actually divisible by the count per page, which is slightly harder to detect since it requires knowing what the underlying call used as its limit.)