The song, "Now and Then", that used artificial intelligence to include the vocals of John Lennon and guitar by George Harrison, who died in 1980 and 2001 respectively, was released last Thursday.
The Beatles remain second to Elvis Presley, who has scored 21 number ones on the chart since his first hit in 1957. "'Now and Then' is not terrible... But ultimately, it's kind of mundane," wrote Geoff Edgers in the Washington Post.Parts of it also conjured up "that classic, bittersweet, Beatles-esque flavour", wrote reviewer Will Hodgkinson.
McCartney, 81, announced the song's release in June, in what was dubbed in a promotional trailer "the last Beatles song".
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