I also tried to predict #66 in a similar way but the ranges I got are still too big to do anything useful. I don't have high end hardware to test the predictions either, and the ranges I got are around 40% of the total range.
Factoring in that most likely the beginning and end of the ranges have been searched already, and doing other basic assumptions, you can reduce the range down but it's still too big.
Furthermore, now I am trying my luck on #130 because why not. It is very unlikely that #66 will get in my hands (or yours) so I just gave up on that.