256 (number)

Two hundred fifty-six (256, CCLVI) is the natural number following two hundred and fifty-five and preceding two hundred and fifty seven. It is a composite number, with the factorization 256 = 2⁸, which makes it a power of two.

256
Cardinal	Two hundred [and] fifty-six
Ordinal	256th
Factorization	$256=2^{8}$
Roman numeral	CCLVI
Binary	100000000
Hexadecimal	100

It is also equal to:

• 16², the square of 16
• 4⁴
• 4↑↑2 using Knuth's up-arrow notation

Two hundred fifty-six is also:

• The number of characters in the new Braille 8-dot system
• The number of different values in one byte, which makes it the typical number of different values in each color channel of a digital color image (see color space encoding)

See also: Two hundred