I think 526 means it beat the record of the longest-running play in the last five years of Broadway. I'm assuming the previous longest-running play was 525!
I do think it's funny, though. Kind of like Les Mis' twenty-first anniversary. Why's that one so special, because now Les Mis is old enough to drink?
In my pants, she has burst like the music of angels, the light of the sun! --Marius Pantsmercy