I am aware that there is a minimum size of a Black Hole where it functions according to our theories of the universe, that being defined by the Plank Mass, if I understand correctly.
But, my question is, given an essentially infinite amount of mass to pull from (thus ignoring the limitations that come from just the amount of matter. As with said limitation it is 23547596586.294921875 Light Years due to mass limits), is there a size of a Black Hole where scientists believe that it would stop functioning in the way in which we understand it?