If a computer has been for example serching for a really big prime number for decades, how do they upgrade it. Do they stop the calculation or what?
In: Technology
It depends on how they have designed the computer and written the calculations. But it is not hard to imagine that they keep a note of where they are in the calculation as they go along. So if something happens they can always just go back to the stored data and pick right back up again where they left off. You do the same yourself. If you are doing some long calculations you probably keep a pencil in your hand to write down the numbers as you go along. If you get distracted with something or even if you just get tired and want to go to sleep you can pick up again where you lef off. You might need to go back a few steps until the last number you wrote down but in the grand scheme of things this does not matter that much.
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