# 256 (number)

 ← 255 256 257 →
Cardinaltwo hundred fifty-six
Ordinal256th
(two hundred fifty-sixth)
Factorization28
Greek numeralΣΝϚ´
Roman numeralCCLVI
Binary1000000002
Ternary1001113
Octal4008
Duodecimal19412

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 a perfect square (162).
• 256 is the only 3-digit number that is zenzizenzizenzic. It is 2 to the 8th power or ${\displaystyle ((2^{2})^{2})^{2}}$.
• 256 is the lowest number that is a product of eight prime factors.

Removing the digit 6 from 256 yields 25, which is another perfect square.

## 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:

(2256 = 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 exactly).[5]

• The number of bits in the SHA-256 cryptographic hash.
• The branding number of nVidia's GeForce 256.

256 is also:

## References

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14. ^ "Hands-On With The 256-Player MAG Beta." Game Informer. 2010-01-06. Archived October 18, 2012, at the Wayback Machine
15. ^ Baron, Salo W. (1957). Social and Religious History of the Jews - V.4 Meeting of East and West (2nd ed.). Columbia University Press. p. 96. ISBN 978-0-231-08841-1.