F#11 chord

The F-sharp dominant eleventh chord (abbreviated F#11 chord) is a six-note chord consisting of the notes F♯, A♯, C♯, E, G♯, and B. The chord is formed by adding an eleventh to the F-sharp dominant ninth chord.

In practice, the third (A♯) and fifth (C♯) are often omitted from the F#11 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.