Jokes on you, I use my fingers as bits for a total of 1024 numbers (0-1023). Or I can sacrifice 1 finger time be a sign bit and count negative numbers too.
Jokes on you, fingers are tri-state (fully extended, fully closed, bent at middle knuckle) not binary, so I can count to 59049.
Someone with better finger control should be able to treat them as quad-state, granting the ability to count to 1048576 by bending just the outer knuckle.
I like this idea in theory, but some combinations of fingers are very awkward to extend without the others, and one particular combination is very rude.