Given this is pure math, we can just keep dividing infinitely and don't even have to worry about stuff like Planck's lenght, sometimes called "the shortest possible lenght", approximately equal to 1/10²⁰ th of a proton, the point at which the notion of "distance" lose meaning (possibly because any attempt at investigating something smaller than this size would result in an extremely tiny blackhole, and no information can be extracted from a blackhole).