256 (number)

256 (two hundred [and] fifty-six) is the natural number following 255 and preceding 257.

255 256 257
← 250 251 252 253 254 255 256 257 258 259 →
  • List of numbers
  • Integers
← 0 100 200 300 400 500 600 700 800 900 →
Cardinaltwo hundred fifty-six
Ordinal256th
(two hundred fifty-sixth)
Factorization28
Greek numeralΣΝϚ´
Roman numeralCCLVI
Binary1000000002
Ternary1001113
Senary11046
Octal4008
Duodecimal19412
Hexadecimal10016

In mathematics

256 is a composite number, with the factorization 256 = 28, which makes it a power of two.

  • 256 is 4 raised to the 4th power, so in tetration notation, 256 is 24.[1]
    • 256 is the value of the expression , where .
  • 256 is a perfect square (162).
  • 256 is the only 3-digit number that is zenzizenzizenzic. It is 2 to the 8th power or .
  • 256 is the lowest number that is a product of eight prime factors.
  • 256 is the number of parts in all compositions of 7.[2]

In computing

One octet (in most cases one byte) is equal to eight bits and has 28 or 256 possible values, counting from 0 to 255. The number 256 often appears in computer applications (especially on 8-bit systems) such as:

  • The typical number of different values in each color channel of a digital color image (256 values for red, 256 values for green, and 256 values for blue used for 24-bit color) (see color space or Web colors).
  • The number of colors available in a GIF or a 256-color (8-bit) bitmap.
  • The number of characters in extended ASCII[3] and Latin-1.[4]
  • The number of columns available in a Microsoft Excel worksheet until Excel 2007.[5]
  • The split-screen level in Pac-Man, which results from the use of a single byte to store the internal level counter.
  • A 256-bit unsigned integer can represent up to 115,792,089,237,316,195,423,570,985,008,687,907,853,269,984,665,640,564,039,457,584,007,913,129,639,936 values.[6]
  • The number of bits in the SHA-256 cryptographic hash.
  • The branding number of Nvidia's GeForce 256.


References

  1. "Power Tower." MathWorld. Archived April 27, 2014, at the Wayback Machine
  2. Sloane, N. J. A. (ed.). "Sequence A001792". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. "ASCII character chart." Microsoft. Archived January 19, 2013, at the Wayback Machine
  4. "Windows 28591." Microsoft. Archived July 24, 2013, at the Wayback Machine
  5. "Improving Performance in Excel 2007: The ‘Big Grid’ and Increased Limits in Excel 2007." Microsoft. Archived December 7, 2013, at the Wayback Machine
  6. "Google Search Engine Tools Results". Retrieved 10 September 2015.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.