Sensipent comma

78732/78125 = |2 9 -7>, the sensipent comma or medium semicomma, is an interval of 13.399 cents which is the amount by which the difference between seven minor thirds and two fourths exceeds an octave, in other words (6/5)^7 / (4/3)^2 / 2. Tempering it out leads to sensipent temperament.