Number 256

A page of the Numeropedia - the Special Encyclopedia of Numbers

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[EECS]  The number of possible values that can be stored in a byte (8 bits); 256 = 28.

[Library]  ISBN-0-262 is the International Standard Book Number for books published by Richard D. Irwin, Inc.

[Math.]  Two fourth powers using the same digits: 44 = 256 and 54 = 625.

[Measure] The number of drams in a pound.

British imperial units for weight measures: 1 stone = 14 lb (pounds) = 224 oz (ounces) = 3584 drams = 98,000 grains = 6350.29318 g (grams) & 1 grain = 64.79891 mg (milligrams) & 1 ounce = 16 drams = 437.5 grains & 1 dram = 2711/32 grains.

[Measure]  The number of fluid drams in a quart.

U.S. customary units for liquid measures: 1 gallon = 4 quarts = 8 pints = 32 gills = 128 fluid ounces = 1024 fluid drams = 61440 minims = 3.785411784 liters = 231 inch3.

[Phone]  International telephone dialing code for Uganda.

[Science]  Sedimentary units of rock:

The size of clay unit is less than 1/256 mm.

The size of silt unit is from 1/256 to 1/16 mm.

The size of very fine sand is from 1/16 to 1/8 mm.

The size of fine sand is from 1/8 to ¼ mm.

The size of medium sand is from ¼ to ½ mm.

The size of coarse sand is from ½ to 1 mm.

The size of very coarse sand is from 1 to 2 mm.

The size of granule is from 2 to 4 mm.

The size of pebble is from 4 to 64 mm.

The size of cobble is from 64 to 256 mm.

The size of boulder is greater than 256 mm.

[Tech.]  The AES (Advanced Encryption Standard) algorithm uses 128, 192- and 256-bit keys to encrypt/decrypt 128-bit plaintext/ciphertext in banking funds transfer security, replacing the DES (Data Encryption Algorithm), after the year 2000.

[Tech.]  The hash functions recommended/approved by NIST to replace SHA-1, which outputs 160 bits hash: SHA-512, SHA-384, SHA-256 and SHA-224. All 3-digit number indicates the number of output bits.

[Tech.]  The standard maximum number of bits using in a RFID (Radio Frequency Identity) tag, while that for a “smart RFID tag” is 256 bits.