100111111

100111111 is a binary numeral consisting of nine bits. In base-2 notation, it encodes a numeric value that can be used to represent data, addresses, or instructions in digital systems.

As an unsigned integer, 100111111 equals 319 in decimal and 0x13F in hexadecimal. If interpreted as a signed value in a 9-bit two's complement system, the same bit pattern represents -193.

In computing practice, nine-bit patterns like this can appear in educational materials, bit-manipulation examples, or as literals in source code (for example, binary literals often written with a 0b prefix in languages that support it). The precise meaning depends on context, including endianness and encoding schemes.

100111111 does not, by itself, correspond to a widely recognized standard, product, or protocol; it is primarily notable as a concrete binary value that can illustrate base conversion and bitwise operations. See also the binary numeral system, decimal numeral system, hexadecimal, and two's complement.