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A query that has only got two different prime factors

  1. Dec 2, 2003 #1
    Yes, ofcourse, a primenumber is a number that can only be divided with itself and 1.

    But what do you call a query that has only got two different prime factors?

    9 has got the factors 9, 3 and 1. But has only two different prime factors. 9 = 3*3, so the query has got the prime factors 3 and 1.

    27 has also only got two prime factors, 3 and 1

    aswell as 3.

    0 and 1 has got one prime factor

    0 1 2 3 4 5 7 8 9 11 13 16.... has got two prime factors etc.
     
    Last edited by a moderator: Dec 2, 2003
  2. jcsd
  3. Dec 2, 2003 #2
    1 isnt a prime therefore it cannot be a prime factor of any number.
     
  4. Dec 2, 2003 #3

    mathman

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    Powers of a prime don't have any special name except "power of a prime".
     
  5. Dec 9, 2003 #4
    Then 2,3,5,7,11 and thirteen are not primes either.
     
    Last edited: Dec 9, 2003
  6. Dec 9, 2003 #5

    Hurkyl

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    Every number is a factor of 0.
     
  7. Dec 9, 2003 #6
    I agree, totally!
     
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