It's a fun party trick, counting to 2^10-1 (1023) using your fingers! Kids counting 1-10 use, effectively, "unary notation". One could count even higher if wi

It's a fun party trick, counting to 2^10-1 (1023) using your fingers! Kids counting 1-10 use, effectively, "unary notation". One could count even higher if willing to put each finger into an intermediate state, as base-3 or base-4.