No-twos 31-limit
In no-twos 31-limit Just Intonation, all ratios will contain neither 2 nor primes higher than 31. It is a non-octave 31-limit system.
Purpose
A purpose of no-twos 31-limit Just Intonation is to extend the Bohlen-Pierce scale all through the 31-limit.
See also
User:Contribution/No-twos 31-limit - Includes a large table of no-twos 31-limit intervals