Kipyegon’s time initially read as 4:06.91, but was later adjusted to 4:06.42. Nike has explained what happened.

Faith Kipyegon ran a mile in 4 minutes, 6.42 seconds — more than a second faster than her world record — at “Breaking4,” a special event billed as Kipyegon’s attempt to become the first woman to run a mile in under four minutes. Video of Kipyegon’s mile is here.

The three-time Olympic gold medalist ran a personal-best time of 4:06.42 in a special event dubbed “Breaking4: Faith Kipyegon vs. the 4-Minute Mile” on Thursday at Stade Sébastien Charléty in Paris. The event was a partnership between Nike and Kipyegon, as she aimed to become the first woman in history to run a mile in under 4 minutes.