5 (Murder by Numbers) is the eleventh mixtape by Americanrapper50 Cent. The album was set to be his fifth studio album, a follow up to his 2009 studio album, Before I Self Destruct. Due to tension with Interscope Records, 50 Cent instead had to make 5 (Murder by Numbers) a separate, digital-release-only album, and instead release a new collection of material as his fifth studio album, titled Street King Immortal.
While recording 5 (Murder by Numbers), 50 Cent listened to a mix of music performed by his favourite artists, including rappers Tupac Shakur and The Notorious B.I.G.. In an interview with the Detroit Free Press, 50 Cent explained these actions, stating, "I listen to those records to create expectations... It creates a level to me, within myself, of how good the record has to be before I'm ready to launch it." In the same interview, he described the album as a "whole new sound" for him and felt that it was "more soulful" and "more mature" than his previous work. 50 Cent confirmed the album's title; 5 (Murder by Numbers) in an interview with the radio station "Hot 107.9 Philly" on June 13, 2012.