As character names:

U+1D791 MATHEMATICAL SANS-SERIF BOLD ITALIC CAPITAL BETA character (𝞑)

As raw characters:

𝞑

As a string of HTML entities:

𝞑

Decoder output:

Byte number 1 is decimal 240, hex 0xF0, octal \360, binary 11110000
This is the first byte of a 4 byte sequence.

Byte number 2 is decimal 157, hex 0x9D, octal \235, binary 10011101
This is continuation byte 1, expecting 2 more.

Byte number 3 is decimal 158, hex 0x9E, octal \236, binary 10011110
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 145, hex 0x91, octal \221, binary 10010001
This is continuation byte 3, expecting 0 more.

U+1D791	MATHEMATICAL SANS-SERIF BOLD ITALIC CAPITAL BETA
	# <font> 0392 greek capital letter beta