78/77
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| Ratio | 78/77 |
| Factorization | 2 × 3 × 7-1 × 11-1 × 13 |
| Monzo | [1 1 0 -1 -1 1⟩ |
| Size in cents | 22.338814¢ |
| Names | negustma, tridecimal minor third comma |
| Color name | 3o1ur1, tholuru unison, Tholuru comma |
| FJS name | [math]\text{P1}^{13}_{7,11}[/math] |
| Special properties | superparticular, reduced |
| Tenney height (log2 nd) | 12.5522 |
| Weil height (log2 max(n, d)) | 12.5708 |
| Wilson height (sopfr (nd)) | 36 |
| Harmonic entropy (Shannon, [math]\sqrt{nd}[/math]) |
~4.02739 bits |
| Comma size | small |
| S-expression | S12 × S13 |
| open this interval in xen-calc | |
78/77, the negustma or tridecimal minor third comma, is a 13-limit no-fives comma of about 22.3¢. It is the difference between 13/11 and 7/6 as well as the difference between 13/7 and 11/6.