For example, how does an infinitely randomized world like Minecraft manage to generate me an identical world to my friend with just a handful of numbers that they send me?
In: Technology
All “random” numbers generated by computers aren’t actually random. In reality they form a repeating sequence of “pseudo-random numbers”, which can be longer or shorter, depending on the quality of the number generator.
For example, the PRNG in the 8-bit Sinclair ZX Spectrum computer has a period of 65537, which is 1+2^16. This means that after that many numbers generated, they will always repeat themselves, until you give it a new seed.
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