C Major 9#11, 5th inversion (F# in the bass)
Also written as Cmaj9#11/F#.
Notes, from the bass up
F# (bass)CEGBD
The same notes as C Major 9#11 (F#, C, E, G, B and D), rearranged so F# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.