100100101

100100101 is a binary numeral. In decimal, it represents 293, since it equals 2^8 + 2^5 + 2^2 + 2^0. In hexadecimal, the same value is 0x125. As a nine-bit pattern, it does not correspond to a single byte, which means it often appears in contexts involving non-byte-aligned data or larger bit-width registers.

In computing and digital systems, binary strings like 100100101 are used as patterns, flags, addresses, or data fields within hardware description languages, communication protocols, or custom encodings. Because it is nine bits long, it may be employed in architectures or interfaces that operate with 9-bit units or in bit-packed data where fields occupy partial bytes.

When written in source code, binary literals are commonly prefixed to distinguish them from decimal or hexadecimal values, for example as 0b100100101 in languages that support binary notation. Such prefixes help clarify the base of the literal and reduce ambiguity during compilation or interpretation.

See also: binary numeral system, bit pattern, hexadecimal notation, non-byte-aligned data.