the farthest known planet from Earth is PSO J318.5-22. This planet is a gas giant located approximately 80 light-years away from Earth in the constellation of Scorpius. It was discovered in 2013 and is estimated to have a mass six times that of Jupiter. PSO J318.5-22 is a free-floating planet, meaning it is not orbiting a star and instead drifts through space independently.
It's important to note that the field of exoplanet discovery is rapidly evolving, and new discoveries are continually being made. Therefore, it's possible that our knowledge of the farthest known planet may have changed. I recommend referring to the latest scientific sources and astronomical databases for the most up-to-date information on distant exoplanets.