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Math Help - Prime numbers question

  1. #1
    Junior Member BERMES39's Avatar
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    Prime numbers question

    I have this table listing the first 500 prime numbers. Some numbers are printed in blue (mostly lower numbers) while the rest are printed in red.
    I have not been able to find what makes these two groups different. Could someone please explain this? Thanks.
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  2. #2
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    Re: Prime numbers question

    Quote Originally Posted by BERMES39 View Post
    I have this table listing the first 500 prime numbers. Some numbers are printed in blue (mostly lower numbers) while the rest are printed in red. I have not been able to find what makes these two groups different. Could someone please explain this? Thanks.
    Perhaps if you supplied more of the context in which this table appears someone could give a very good guess if not an outright explication.
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  3. #3
    Junior Member MathVideos's Avatar
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    Re: Prime numbers question

    I have stared at this for about a half an hour and cannot figure any rule out that separates the blues from the reds. I've looked up all sorts of different types of primes and nothing seems to work. Probably because I just haven't looked hard enough.
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