A PRNG (pseudorandom number generator) is an algorithm that outputs numbers in a complex, seemingly unpredictable pattern. Truly random numbers (say, from a radioactive source) are utterly unpredictable, whereas all algorithms are predictable, and a PRNG returns the same numbers when passed the same starting parameters or seed.... Help improve MDN Was this page helpful to you? Yes No Learn...Learn how to contribute . This page was last modified on Jun 8, 2023...