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If it can not be divided by anything as a whole.

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The above is true, but "primeness" testing has become a major research branch of theoretical math. If I give you a large number, (eg: 123,456,789,012,345 ) can you prove it is or is not prime??

If you figure out a way, apart from attempting to divide it by all its potential factors like 2, 3, 4, 5, etc, etc. be sure to write it up and have it notarized, certificated, recorded, and then publish it. You will be the hero (or heroine) of the mathematical world. Also some of the eminent mathematical theoreticians will probably want to kill you.

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13y ago

What else can I help you with?