The Simpsons

Since its debut on December 17, 1989, 639 episodes of The Simpsons have been broadcast. It is the longest-running American sitcom, and, in 2009, it surpassed Gunsmoke as the longest-running American scripted primetime television series in terms of seasons and surpassed the Western in terms of episodes in 2018. The Simpsons Movie, a feature-length film, was released in theaters worldwide on July 27, 2007, and grossed over $527 million. On November 4, 2016, the series was renewed for a thirtieth season, extending the show to May 2019; it will premiere on September 30, 2018.

Question: is the simpsons the longest running tv show ever
Answer: no