256 (number)
From HandWiki
Short description: Natural number
| ||||
|---|---|---|---|---|
| Cardinal | two hundred fifty-six | |||
| Ordinal | 256th (two hundred fifty-sixth) | |||
| Factorization | 28 | |||
| Greek numeral | ΣΝϚ´ | |||
| Roman numeral | CCLVI | |||
| Binary | 1000000002 | |||
| Ternary | 1001113 | |||
| Quaternary | 100004 | |||
| Quinary | 20115 | |||
| Senary | 11046 | |||
| Octal | 4008 | |||
| Duodecimal | 19412 | |||
| Hexadecimal | 10016 | |||
| Vigesimal | CG20 | |||
| Base 36 | 7436 | |||
256 (two hundred [and] fifty-six) is the natural number following 255 and preceding 257.
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 [math]\displaystyle{ n^n }[/math], where [math]\displaystyle{ n=4 }[/math].
- 256 is a perfect square (162).
- 256 is the only 3-digit number that is zenzizenzizenzic. It is 2 to the 8th power or [math]\displaystyle{ ((2^2)^2)^2 }[/math].
- 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
- ↑ "Power Tower." MathWorld.
- ↑ Sloane, N. J. A., ed. "Sequence A001792". OEIS Foundation. https://oeis.org/A001792.
- ↑ "ASCII character chart." Microsoft.
- ↑ "Windows 28591." Microsoft.
- ↑ "Improving Performance in Excel 2007: The ‘Big Grid’ and Increased Limits in Excel 2007." Microsoft.
- ↑ "Google Search Engine Tools Results". https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=2%5E256.
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