Highest Bris Prime Power entering the Derby

[arw629]

I was skimming over old pps for derbies past and noticed Pegasus had a prime power number of 175 and that seemed significantly higher than other Derby horses over the years. The horse that I thought might compare entering the Derby was Big Brown and even he only had 156. I Just thought this was interesting and wanted to share. Since Bris prime power has existed I wonder if Fusiachi Pegasus had the highest number entering the Derby ever?
Does anyone seriously use this number when handicapping the derby?