I don't know if you could work this in, might mean even less cycles; discount any number that ends in a 5 or 0 (25, 50, 165) 'cause they're all multiple of 5 (except 5 itself that is) (actually 0 is already covered as its a multiple of 2)

In reply to Re: Re: YAPNC: Yet another prime number checker? by martymart
in thread YAPNC: Yet another prime number checker? by snafu

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