WordNet records no synonym and no antonym for equivalent-binary-digit factor. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
the average number of binary digits needed to express one radix digit in a numeration system that is not binary; on the average a number that can be expressed in N decimal digits takes 3.3N binary digits
Synonyms, antonyms and the broader and narrower relations for equivalent-binary-digit factor come from Princeton University’s WordNet. Full sources and licences.