1001010101

1001010101 is a binary numeral consisting of ten bits. In base-2 notation it represents a specific bit pattern that is frequently used in introductory computing examples and digital electronics. When interpreted as an unsigned integer, the value is 597 decimal (the bits from most to least significant contribute 2^9 + 2^6 + 2^4 + 2^2 + 2^0). In hexadecimal, this pattern corresponds to 0x255.

As a signed value using two's complement in a 10-bit system, since the most significant bit is 1, the pattern represents -512 + 85 = -427.

Pattern characteristics and potential uses

The sequence features a mix of ones and zeros and ends with the trailing 0101, a common motif in demonstrations of bit toggling and clock-driven circuits. The ten-bit length makes it convenient for illustrating bit shifts, masking, and logical operations without alignment to an 8-bit boundary.

Context and relevance

1001010101 may appear in teaching materials, test vectors for logic simulators, or as a sample binary key or identifier in datasets. While it is not tied to a specific standard encoding by itself, it serves as a concrete example for explaining conversions between binary, decimal, and hexadecimal, and for exploring two's complement interpretation for n-bit integers.