It is a self-extending composition by British composer and musician Jeremy Max Finer. Started playing on 1st of January, 2000, it is expected to continue for a 1000 years without repetition until 31st of December, 2999. It is currently being played for more than 21 years and 3 months in a 19th century lighthouse near Canary Wharf, London. Officially Incredible!!
To Break The Record (top), A musical performance must continue without repetition for a duration longer than 1000 years.