What was The Beatles' first number one single?

The Beatles have the most number ones of any artist in musical history, but which track was their first chart-topper? And who wrote it?

The Beatles' first number one was written by one member - 'My song

How The Beatles Changed The World

Now and Then is a beautiful Fab Four reunion. Too bad it's not a

The Beatles – The Number Ones (1983, 1st variation, Vinyl) - Discogs

How Many No. 1 Beatles Hits Did John Lennon Sing the Lead Vocal on

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The Beatles Are On Course To Land Their First Number 1 In Over 50

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What was the first big hit of The Beatles? - Quora