use `check-instance` instead; reformat USING:`
use `check-instance` instead; reformat USING:`

tgunr/factor,mrjbq7/factor,tgunr/factor,factor/factor,tgunr/factor,factor/factor,mrjbq7/factor,tgunr/factor,mrjbq7/factor,mrjbq7/factor,factor/factor,factor/factor,tgunr/factor,mrjbq7/factor,mrjbq7/factor,tgunr/factor,factor/factor,factor/factor