In a `DRC` or `IRC` calculation, results will be printed whenever the calculated
geometry changes by 0.05 Å. The geometry change is defined as the linear sum of
the translation vectors of motion for all atoms in the system. Abbreviation, `
X-PRIO`. See Dynamic and Intrinsic Reaction
Coordinates for more details.

See also `X-PRIORITY=n.nn` and
`T-PRIORITY`.