What is the theoretical final, dark remnant state a white dwarf is predicted to eventually become after cooling for eons?

Answer

Black Dwarf

Over unimaginably long periods, a white dwarf is expected to radiate away all its heat and cool down completely, becoming a cold, non-luminous object termed a Black Dwarf.

What is the theoretical final, dark remnant state a white dwarf is predicted to eventually become after cooling for eons?
starstellar evolutionastrophysicsdwarf star