Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

Of course it divides m. We said it did. But just because you say the moon is made out of cheese that does not make it so.

The problems is, this prime q and it must exist is outside of our list. We have a contradiction. The original premise is wrong, there is no largest prime.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Yes, I'm following you. Ok, I'll go re-read the proof to see if there's anything I want to ask you. (I love understanding deeply something, hope it won't bother you.)

Thank you for your help

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Oh ok, could you explain me where the +1 comes from? It seems rather mysterious...

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

Look it over and let me know.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Just in case you didn't see my second post..

*Last edited by Al-Allo (2013-08-09 05:35:34)*

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

It is chosen because it is obviously bigger than p1p2...pn and because it is odd. Also, because it makes the proof work and because he is is brilliant.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

mmmmh.....not following.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

Do you see that p1p2...pn is even?

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Well, I don't see why it couldn't be odd.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

p1 = 2, so p1p2p3...pn is even.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Ah ok, yes xD Ok so p1p2pn is even

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

so m=p1p2pn+1 is odd

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

Yes, so it has a chance of being prime. That is part of the brilliance of his idea.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Mmmhh...it seems rather risky, don't you think ? It has a chance, but this is risky.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

How he came up with the idea is beyond me.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

In fact, I'm not in agreement with this. How can this be accepted ? WE have many odd numbers not primes.........

*Last edited by Al-Allo (2013-08-09 05:57:57)*

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

Agreement with what?

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

That m=p1pn2+1 is prime

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

He is not saying that. Since it is odd it must be prime or composite.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

ok, anyway, ill be going, if i have any other question, they will be here ! thank you for your support

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 97,269

Okay, see you later.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline