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?

Readers' Poll: The 10 Greatest Early Beatles Songs

The Beatles top charts with 'Now And Then' - 60 years after first

The George Harrison song inspired by his first time on LSD

When John Lennon compared the Beatles to Jesus in 1966

Every Beatles U.S. No. 1 Single Ranked

The Beatles 1…Is Not Enough – On The Records

How America fell for the Fab Four: The Beatles arrived in the U.S.

Eric Clapton v. George Harrison: The Duel from All Angles

The Beatles set record 54-year gap between No 1 singles as Now and

Frankie G T Hollywood, Articles