number/digit: 2(2×5/3) = 8×(2(1/3)).
Culturally important. This is the base for the so-called 'binary' prefixes ("kibi-", "mebi-", etc.). By switching to this base, "ki'o"/"kilto" might (in some Lojban dialects) refer to one thousand twenty-four (id est: 'kibi'); if we denote this number by "b" (for "binary" and "base"), then "ki'o"/"kilto" would (in those dialects) refer to b3 = (2(2×5/3))= 2(2×5) = 1024 (in decimal notation); likewise for any other standard 'binary' prefix (ones which refer to a numeric coefficient of form 2(2×5n) for nonzero integer n). In any case, "bi'ei zei kilto" would probably refer to such a value.