That's not hard to do with that script. I've gone 4 days at tzhaar before, almost all of my proggies are 2 days+, it only shutsdown when you run out of supplies.
Somewhat impressive although I've had higher and I've seen multiple day proggys i think it only shuts down once its out of supplies. The longest I went was 82 hours and ran out of lobs at cockroach soldiers