Classic Prius tire pressures
The Toyota reccomendation was 35 psi front 33 rear, just as it is now.
Some drivers (myself included) use somewhat higher psi, primarily for tire life and balanced tread wear. This remains a somewhat controversial topic.
Never exceed the max cold psi spec on the tire sidewall; if you do, the responsibiity is yours. In a 2001 Prius, I now have tires that max at 44 psi. They do very well at 41F/39R. I expect them to last at least 55k miles.
Everyone ought to have a tire gauge and use it at least monthly! At least before road trips, check the funny little spare tire (60 psi) too.
DAS