What's the highest recorded score on Sewer Bat Extreme and Totally Insane?

[BluRayHiDef]

What are the highest scores anyone has ever earned on the aforementioned challenges? The leader boards don't allow you to look past a certain point in-game. I've tried searching for this information online, but can't find it. Also, what's the longest combo-chain anyone has ever gotten? The longest one I've ever gotten was 53.