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Reversing Factorio's RNG

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Hacker News | Sep 12, 2026 | jheitmann

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The theoretical aspects of how the RNG works still apply, as they still use the same RNG. Here we follow the convention that the most significant bit (highest bit) is the leftmost bit xn−1x_{n-1} and the least significant bit is the rightmost bit x0x_0. Computing the quality levels from RNG states in-game.

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