Never used it before. Maybe they forgot to reduce to the lowest common denominator or it forgot it's prime numbers.
Seriosuly, if you had data stored there sorry. There are other on-line formulators. The recipator comes to mind or, download the free trial of beersmith. ww.kotnf.com has a nice set of clculators too if that is all you need.
yeah, I checked back later and it was up and running again. I'll have to check out those other sites that were mentioned also. I didn't know there were so many out there.