Pontigailimma

Interval information
Ratio	1990656/1990625
Factorization	213 × 35 × 5-5 × 7-2 × 13-1
Monzo	[13 5 -5 -2 0 -1⟩
Size in cents	0.0269603¢
Names	pontigailimma,; 55⋅72⋅13 atom
Color name	3urrg51, thururuquingu comma
FJS name	[math]\displaystyle{ \text{d1}_{5,5,5,5,5,7,7,13} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	41.8496
Weil norm (log2 max(n, d))	41.8496
Wilson norm (sopfr(nd))	93
Comma size	unnoticeable
	Open this interval in xen-calc

The pontigailimma is an unnoticeable 13-limit (specifically 2.3.5.7.13-subgroup) comma with a ratio of 1990656/1990625 (0.027 ¢). It is the difference between two 7/4's and a stack of 16/13 above five 6/5's. Alternatively, it is the amount by which 27/25 exceeds a stack of 25/24, 49/48, and 65/64. In terms of superparticular commas, it is the difference between 4096/4095 and 4375/4374.

It also appears as the difference between several non-superparticular comma pairs:

It is tempered out in hemikleismic, vulture, pontiac, abigail, ennealimmal, and alphatrillium temperaments, as well as by 46, 50, 53, 68, 103, 121, 171, 217, 224, 270, 441, 494, 643, 814, 935, 3125, 3395, 6079, 8539, 11664, and 16808edo.

Its name potentially comes from ponti [pontiac] + gai [abigail] + limma [from Greek λεῖμμα, the remnant]. Thus, it is the tiny remnant that is tempered out in pontiac and abigail.