Search results
Results From The WOW.Com Content Network
This means that the first hexadecimal digit in the third group always starts with a 4 in UUIDv4s. Visually, this looks like this xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx, where M is the UUID version field. The upper two or three bits of digit N encode the variant. For example, a random UUID version 4, variant 2 could be 8D8AC610-566D-4EF0-9C22 ...
The check digit is computed as follows: If the number already contains the check digit, drop that digit to form the "payload". The check digit is most often the last digit. With the payload, start from the rightmost digit. Moving left, double the value of every second digit (including the rightmost digit). Sum the values of the resulting digits.
Lucky number. In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the Sieve of Eratosthenes that generates the primes, but it eliminates numbers based on their position in the remaining set, instead of their value (or position in the initial set of natural numbers). [1]
For example, squaring the number "1111" yields "1234321", which can be written as "01234321", an 8-digit number being the square of a 4-digit number. This gives "2343" as the "random" number. Repeating this procedure gives "4896" as the next result, and so on. Von Neumann used 10 digit numbers, but the process was the same.
However, generally they are considerably slower (typically by a factor 2–10) than fast, non-cryptographic random number generators. These include: Stream ciphers. Popular choices are Salsa20 or ChaCha (often with the number of rounds reduced to 8 for speed), ISAAC, HC-128 and RC4. Block ciphers in counter mode.
A k-combination of a set S is a k-element subset of S: the elements of a combination are not ordered. Ordering the k-combinations of S in all possible ways produces the k-permutations of S. The number of k-combinations of an n-set, C(n,k), is therefore related to the number of k-permutations of n by: (,) = (,) (,) = _! =!
Base32 is an encoding method based on the base-32 numeral system.It uses an alphabet of 32 digits, each of which represents a different combination of 5 bits (2 5).Since base32 is not very widely adopted, the question of notation—which characters to use to represent the 32 digits—is not as settled as in the case of more well-known numeral systems (such as hexadecimal), though RFCs and ...
Mastermind (board game) Mastermind. (board game) Mastermind or Master Mind ( Hebrew: בול פגיעה, romanized : bul pgi'a) is a code -breaking game for two players invented in Israel. [ 1][ 2] It resembles an earlier pencil and paper game called Bulls and Cows that may date back a century.