I've read in another thread here on HN that we also don't know the factors that go in. Someone listed off things like company title, marital status, # kids, car make/model kind of stuff. No idea if they were full of BS, but there's no requirement that the score is based solely on items in your credit report. We can probably (hopefully?) be sure that no race or race-correlated factors are included. (And same for other protected classes.)