1X1=1 (To Be One) is the debut extended play by South Korean boy group Wanna One, a project group created through the 2017 Mnet survival show, Produce 101 Season 2, composed of eleven trainees from different entertainment companies that will promote for 18 months under YMC Entertainment. The album was released digitally and physically on August 7, 2017 by YMC Entertainment, Stone Music Entertainment and CJ E&M Music. A Japanese version of the album was released on September 27, 2017 through Pony Canyon.