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Communications of the ACM

Communications of the ACM

A fast random number generator for IBM 360

Marsaglia and Bray [1] recommend incorporating two-line random number generators directly into FORTRAN programs. One of the advantages of this is the time saved in avoiding linkage to and fro from a subroutine. Implicit in their FORTRAN routine for IBM 360 for Lehmer's multiplicative congruence method, namely; Uk+1 = &lgr;Uk (mod P), Xk+1 = Uk+1/P is the use of 232 as the value of modulus P.

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