The article describes how to reverse engineer the internal 128-bit state (four 32-bit integers) of the xorshift128 random number generator, following similar previous analyses of the Mersenne Twister and lehmer64 generators.
The article explains how to recover the internal state of the Xorshift128 pseudorandom number generator by observing its output. It details the structure of the generator, which uses four 32-bit words (a, b, c, d) shifted every call, and shows how a small number of outputs suffice to reconstruct the full state through solving linear equations.