Odyssey comma

Interval information

Ratio	4004001/4004000
Factorization	2-5 × 32 × 5-3 × 7-1 × 11-1 × 13-1 × 232 × 292
Monzo	[-5 2 -3 -1 -1 -1 0 0 2 2⟩
Size in cents	0.0004323761¢
Name	odyssey comma
Color name	bitwenotwetho-athulurutrigu 2nd, 29oo23oo3u1urg32, bitwenotwetho-athulurutrigu comma
FJS name	[math]\text{m}{-2}^{23,23,29,29}_{5,5,5,7,11,13}[/math]
Special properties	square superparticular, reduced
Tenney height (log2 nd)	43.866
Weil height (log2 max(n, d))	43.866
Wilson height (sopfr(nd))	166
Harmonic entropy (Shannon, [math]\sqrt{nd}[/math])	~1.19982 bits
Comma size	unnoticeable
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4004001/4004000, the odyssey comma, is a 29-limit no-17s no-19s unnoticeable comma measuring about 0.00043 cents. It was named by Tristan Bay in 2024 after the film 2001: A Space Odyssey, because it is the superparticular ratio with 2001² as its numerator, or S2001 (see Square superparticular).