Try one that lasts 1,000 years, wrote Becky Ferreira in the article, The Slowest Songs in the World, in which she noted that the Lips 7 Skies H3 is a mere heartbeat compared to John Cages Organ2/ ASLSP which takes 639 years to perform, or Jem Finers Longplayer (1,000 years long)! And finally, she wrote, theres Mels Olitsky, which tops out at 1,648,171 years, 7 weeks, 2 days, 10 hours, 23 minutes, and 33 seconds.
Ferreira compared the Lips song to the end of an acid trip, and described their technique thusly: The band just plays the song.
(Ellipses hers. Ouch!)