89-limit
The 89-limit consists of just intonation intervals whose ratios contain no prime factors higher than 89. It is the 24th prime limit and is a superset of the 83-limit and a subset of the 97-limit.
The prime 89 is the start of a record prime gap ending at 97, the previous record prime gap being the one corresponding to the 23-limit. Thus, it marks a potential stopping point for prime limits due to a substantial increment in its harmonic contents. Specifically, these things are contained by the 89-limit, but not the 83-limit:
- The 89-, 91-, 93-, and 95-odd-limit;
- Mode 45, 46, 47 and 48 of the harmonic or subharmonic series.
The 89-limit is the highest prime limit that can be represented with richie's HEJI extensions.