Re: [PrimeNumbers] strange news
- let me ask again.
is this a real discovery? i didn't follow the previous explanation.
Phil Carmody wrote:
> --- On Sat, 11/8/08, Alex Petty <alexander.petty@...
> <mailto:alexander.petty%40gmail.com>> wrote:
> > is this for real?
> Please don't top-post. "This", as a demonstrative pronoun, refers to
> prior context, yet you've placed the context after it.
> > amin B wrote:
> > > Hello friends
> > > Being shocked when I have heard such this amazing news
> > > that an Iranian professor named MR Moosavi has explored the
> > > prime numbers formula.
> > >
> > > http://www.primenumbersformula.com/
> And now to address your actual question - "is this for real?".
> Yes, that mail really was sent to the mailing list.
> Yes, that website really does exist.
> Yes, that website does, as mentioned in the mail, really contain
> information about a prime number-related formula.
> If that doesn't adequately answer your question, perhaps you'd like to
> ask a slightly less nebulous one.
- Alex Petty wrote:
> let me ask again.It depends what you mean by real. It works correctly and he may be the first
> is this a real discovery? i didn't follow the previous explanation.
to publish this particular formula, but useless prime formulas based on
Wilson's theorem are common.
The discoverer added mention of it to Wikipedia in June 2007.
I removed it with an edit summary pointing to Wikipedia policies and ending
"Looks trivial, useless, non-notable":
At the time I checked that the formula actually works.
It uses the well-known Wilson's theorem (apparently first discovered by the
Arabian mathematician Ibn al-Haytham around year 1000) to test whether 2m+1
is an odd prime. If it is then 2m+1 is produced, otherwise 2. Instead of
writing this as a simple if-then-else, it uses a complicated formula with
the floor function to avoid direct use of an if-then-else construct which is
sometimes not considered an allowed part of a "formula".
Jens Kruse Andersen