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tbquan08hanoi's blog

Prime checking
By tbquan08hanoi, history, 5 days ago, In English

Is there a way to check whether an integer is a prime or not in O(log(n))?

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5 days ago, # |
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Yes, Test BPSW is non-proved algorithm, that works in O(log3(n)), but at that time there was no counter-case, it was check till 1e15 numbers, so you can use it, but it too difficult, for most of problems O(sqrt(n)) checking is enough. Link to BPSW

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5 days ago, # |
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miller rabin or fermat there are a lot of famous tests

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