Graviton
The graviton is the comma 129140163/128000000 = [-13 17 -6⟩. It is equal to (81/80)4/(25/24), (81/80)2/(20000/19683), (81/80)/(1600000/1594323), (32805/32768)×(78732/78125) and the parakleisma times the semicomma. Patent vals which temper it out include those for 7, 58, 65, 72, 130, 137, 202 and 346.