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The CRAY random number generator RANF is a Lehmer RNG with the power-of-two modulus m = 2 48 and a = 44,485,709,377,909. The GNU Scientific Library includes several random number generators of the Lehmer form, including MINSTD, RANF, and the infamous IBM random number generator RANDU .
The Cray-3 was a vector supercomputer, Seymour Cray 's designated successor to the Cray-2. The system was one of the first major applications of gallium arsenide (GaAs) semiconductors in computing, using hundreds of custom built ICs packed into a 1 cubic foot (0.028 m) CPU. The design goal was performance around 16 GFLOPS, about 12 times that ...
A Cray-2 and its Fluorinert-cooling "waterfall", formerly serial number 2101, the only 8-processor system ever made, for NERSC A Cray-2 operated by NASA Front view of 1985 Supercomputer Cray-2, Musée des Arts et Métiers, Paris Side view of 1985 Supercomputer Cray-2, Musée des Arts et Métiers, Paris Detail of the upper part of the Cray-2 Inside of the Cray-2
A modification of Lagged-Fibonacci generators. A SWB generator is the basis for the RANLUX generator, widely used e.g. for particle physics simulations. Maximally periodic reciprocals: 1992 R. A. J. Matthews A method with roots in number theory, although never used in practical applications. KISS: 1993 G. Marsaglia
Seymour Roger Cray (September 28, 1925 [1] – October 5, 1996 [2]) was an American electrical engineer and supercomputer architect who designed a series of computers that were the fastest in the world for decades, and founded Cray Research which built many of these machines. Called "the father of supercomputing", [2] Cray has been credited ...
Dice are an example of a mechanical hardware random number generator. When a cubical die is rolled, a random number from 1 to 6 is obtained. Random number generation is a process by which, often by means of a random number generator (RNG), a sequence of numbers or symbols that cannot be reasonably predicted better than by random chance is generated.
The National Center for Atmospheric Research (NCAR) was the first official customer of Cray Research in 1977, paying US$8.86 million ($7.9 million plus $1 million for the disks) for serial number 3. The NCAR machine was decommissioned in 1989. [4]
A pseudorandom number generator ( PRNG ), also known as a deterministic random bit generator ( DRBG ), [1] is an algorithm for generating a sequence of numbers whose properties approximate the properties of sequences of random numbers. The PRNG-generated sequence is not truly random, because it is completely determined by an initial value ...