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Is there any indication the Egyptians understood coprimes ?

  1. Oct 17, 2015 #1
    My apologies for such an unorthodox question, move if necessary

    I've not been able to find much on this, aside from that there is some conjecture { who, I have no idea } that they have understood and cataloged prime numbers.

    If they cataloged prime numbers they certainly understood coprime relationships, I am assuming, or is that wrong to make that assumption ?

    Is there anybody here who might have some knowledge of ancient mathematics ?

  2. jcsd
  3. Oct 19, 2015 #2
    I'm no expert, but I hit WP on Egyptian Fractions (https://en.wikipedia.org/wiki/Egyptian_fraction)

    "the methods used by the Egyptians may not correspond directly to these identities. Additionally, the expansions in the table do not match any single identity; rather, different identities match the expansions for prime and for composite denominators".

    It seems to me that if they had tables of fractions based on products which led to prime and composite products in the denominator, it's safe to say that someone noticed coprime numbers... I think my question for you is what do you mean by the phrase "coprime relationships"?
  4. Oct 22, 2015 #3
    Ok, thank you
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