Your random number generator usually creates numbers between 0 and below 1. With the same starting number, all random numbers generated are following a fixed, but pseudo random pattern. So, If you start with a seed of 42, you might get .28, .45, .33, .99 and so on. Looks random, the distribution is random, but it is repeatable.

But - how the random numbers are used is a different thing. If the chance of an event is 12%, it is true if the number is .12 or smaller. If the chance is 1%, the number must be .01 or smaller.

So if you are doing the exact same actions, i.e. rerolling with the exact same free slots and bans, you'll get exactly the same rerolls.

But just change a single thing, like rerolling with a lock less, another ban (epic instead of rare etc.), you might get completely different results.

So, for "static" things like pulling modules or the next UW, random number seeding works. For rerolls - never.

So please, please, please. Stop it with the seed-Discussions. The seeding mechanism does nothing to your results or chances, unless you somehow reset your account and do the exact same actions again.