E11

E1G♯3B5D♭7F♯9A11

Six notes in theory; in practice the third is usually dropped, because the eleventh sits a half step above it.

What is true of it

E11 is E, G♯, B, D, F♯ and A — 1, 3, 5, b7, 9 and 11 counted from E.

On an instrument that cannot reach all 6, the 3, 5 and 1 go first, in that order.