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Re: [PrimeNumbers] Primes near multiples of 30.

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  • Jack Brennen
    Yes, common knowledge. There are eight numbers between 0 and 30 which have no factor in common with 30: 1, 7, 11, 13, 17, 19, 23, 29.
    Message 1 of 1 , Apr 21, 2010
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      Yes, common knowledge. There are eight numbers between 0 and 30 which
      have no factor in common with 30:

      1, 7, 11, 13, 17, 19, 23, 29.

      taorres wrote:
      > Besides primes being near multiples of 6, is it equally common knowledge that all primes are of the form:
      > (multiple of 30) + 7, 11, 13, 17, 19, 23, 29, or 31 ?
      >
      > adanieltorres
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