It is not Melancholia(2011) but Melancholia 2008, here is IMDB link which says 450 minutes:
http://www.imdb.com/title/tt1269566/
In the table, I also gave the release year of the movie in order to avoid name conflicts.
In the table, I also gave the release year of the movie in order to avoid name conflicts.
Actually, my first thought was that Melancholia might have been 450 minutes long. Because it felt that long when I watched it.