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?

Every Beatles Song That Reached No.1 on the Charts

The Beatles Now And Then - Number 1 Single in UK - Radio 1 Chart

Please Please Me

The George Harrison song inspired by his first time on LSD

When John Lennon compared the Beatles to Jesus in 1966

50 Years Ago Today: The Beatles Released Their Debut Single, 'Love

The Beatles' poignant 'last ever song' Now And Then is on track to

The 50 best Beatles songs ever

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

The Other UK Singles Chart: 2. The New Musical Express Singles

From Me to You - Wikipedia

Feb. 11 1964, the Beatles' first concert in the United States

THE FAB FOUR BREAK CHART RECORD FOR THE LONGEST GAP BETWEEN THE

U.K. Singles Chart: The Beatles Set Records With 'Now And Then

George Harrison's favourite actor of all time