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Topic: prove no largest prime
Replies: 51   Last Post: Jul 12, 2012 3:15 AM

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 Usher73 Posts: 54 From: Michigan Registered: 3/7/06
Re: prove no largest prime
Posted: Jul 11, 2012 4:50 PM

> >
> > > BIGGERPRIME(11) = 2*3*5*7*11 +1
> >
> > > = 2311
> >
> > It is not the case for all n, that if you multiply

> the first n primes
> > together and add one, that the result is a prime.
> >

>
>
> It's NOT?
>
> What's a prime factor of p1*p2*p3*p4..pn +1?
>

2*3*5*7*11*13 = 30030 + 1 = 30031 = 59*509

Date Subject Author
7/4/12 Tim923
7/4/12 FredJeffries@gmail.com
7/4/12 gnasher729
7/4/12 quasi
7/4/12 quasi
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7/7/12 Peter Webb
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7/8/12 Frederick Williams
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7/8/12 Graham Cooper
7/8/12 Graham Cooper
7/9/12 David Bernier
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7/11/12 Graham Cooper
7/11/12 Frederick Williams
7/11/12 Graham Cooper
7/11/12 Frederick Williams
7/11/12 Graham Cooper
7/11/12 Frederick Williams
7/11/12 Graham Cooper
7/11/12 Pubkeybreaker
7/11/12 Frederick Williams
7/11/12 Gary G Forbis
7/11/12 Graham Cooper
7/11/12 dilettante
7/11/12 Gary G Forbis
7/12/12 dilettante
7/12/12 Gary G Forbis
7/11/12 Graham Cooper
7/11/12 Graham Cooper
7/11/12 Usher73
7/8/12 Peter Webb
7/11/12 Frederick Williams
7/9/12 Peter Webb
7/9/12 Graham Cooper
7/9/12 Graham Cooper
7/5/12 Frederick Williams
7/5/12 quasi
7/4/12 Bart Goddard
7/5/12 trj
7/4/12 Ken.Pledger@vuw.ac.nz
7/4/12 gnasher729
7/5/12 Tim923
7/5/12 Graham Cooper
7/5/12 Frederick Williams