logic: use not.
logic: use not.

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