Kilian is #63. He is a bio entry with no previous experience on the peak so he gets relegated down to the "first time hopefuls" category. :-)
Matt has not yet officially entered the race. As a former winner, he has until Aug 11th or so to toss his name into the hat. If he does enter, I doubt he would give himself bib #1. #13 would be in keeping with his style (#19 is taken).