It used to give you 1000 results (100 pages). Then it changed because 'nobody' goes to those last pages and it's very expensive to keep those big sets. Then it dropped to 300 or so. Then it became 'some random number between 20 and 300 depending on invisible factors'. Pretty rare to see a resultset with more than 200 pages. Even 'webcams' (of which there are 10's of millions of pages) gives only 323 results.