Undefined Character (U+2FFFF)

Plane:	Supplementary Ideographic Plane, U+20000 - U+2FFFF^[1]
HTML Entity:	`𯿿` `𯿿`
UTF-8 Encoding:	`0xF0 0xAF 0xBF 0xBF`
UTF-16 Encoding:	`0xD87F 0xDFFF`
UTF-32 Encoding:	`0x0002FFFF`

References