RANDU

thumb|right|Three-dimensional space|Three-dimensional plot of 100,000 values generated with RANDU. Each point represents 3 consecutive pseudorandom values. It is clearly seen that the points fall in 15 two-dimensional planes.

RANDU is an obsolete method for generating random numbers used primarily in the 1960s and 1970s. It is a linear congruential generator (LCG) of the Park–Miller type defined by the recurrence V_{j+1} = 65539 \cdot V_j \bmod 2^{31}