There are many lists (like this one) of songs on albums that go for 10s of minutes, and performers have often extended their songs in concerts to go for a long time, but is there a list available of the longest songs (songs with the greatest duration) that hit one of the big charts (e.g. American Top 40)?
I'm asking specifically about the length of the version of the song that hits the charts - for example, apparently Jethro Tull made a recording of "Thick as a Brick" that runs for over 40 minutes, but that's not the version that hit the charts so it wouldn't "count".