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1 not prime

Discussion in 'Mathematics' started by mathmo2000, Feb 12, 2011.

  1. Sorry to be an **** but just been browsing resources on TES connect where I found a maths toolkit by Shotton Primary. They have incorrectly stated that 1 is a prime in their glossary of maths terms. A basic error really!???
     
  2. DM

    DM New commenter

    Tell them not us!
     
  3. all too common tho - had - erm - discussion with home-ed worksheet site on this - i quoted wolfram to them - they quoted wiki answers back!!!! [​IMG]
     
  4. Andrew Jeffrey

    Andrew Jeffrey New commenter

    Amazingly, I am friends with HT of Shotton Primary - I will mention it to her! She is amazing and would be quite happy to be corrected.
     
  5. DM

    DM New commenter

    You know everyone and everyone knows you Andrew. This I know to be true.
     
  6. There are some Royal Institution Christmas Lectures which were sent to all secondary maths depts (the de Sautoy ones). In lecture one he explains why one is not a prime really well with activities to show how the primes generate all numbers and why 1 doesn't work in the same way.
    If I remember rightly 1 was a prime at some stage in history wasn't it?
     
  7. anon2799

    anon2799 New commenter

    Blimey, that must make me a nobody then [​IMG]
     
  8. DM

    DM New commenter

    He knows you curly. He has just decided you are best avoided.
     
  9. erm

    erm

    which site, flora?
     
  10. anon2799

    anon2799 New commenter

    hahah my reputation goes before me!
     
  11. have pm'd you
     
  12. Andrew Jeffrey

    Andrew Jeffrey New commenter

    Sorry. I didn't mean to imply I knew everyone. It's just a coincidence that I know the head of that particular primary school! Not sure whether we have ever met, CG!

    Weebecka is right about the RI Christmas lecture. Marcus Du Sautoy explained that 1 was prime until around 1824(?) when it was proposed that it should not be as primes were the building blocks from which all numbers could be made by multiplication.

    Obviously 15 for example is 3 x 5, but it could also be 1 x 1 x 3 x 5 1 etc. so 1 was dropped.

    That was the one where he did the brilliant sieve of Eratosthenes by exploding balloons!
     
  13. DM

    DM New commenter

    You wouldn't have been able to explode any balloons andrew as you missed the point entirely. I was fawning at you and having a "pop" (tee hee) at curly at the same time.
     
  14. DM

    DM New commenter

    My God! I am a one-man pun machine.
     
  15. it's one of the things we love you for

     
  16. anon2799

    anon2799 New commenter

    Indeed. Don't have a pop at me DM, I'm well 'ard [​IMG]
     
  17. DM

    DM New commenter

    [​IMG]
     
  18. DM

    DM New commenter

    You're a dog?
     
  19. anon2799

    anon2799 New commenter

    Now that was very rude!
     
  20. DM

    DM New commenter

    Hard nuts have thick skins.
     

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