Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39)
>The Western Number Theory Conference > > http://home.earthlink.net/~bartgoddard/mainpage.html > > meets in Monterey (acutally Asilomar) then it would follow we should meet in the Monterey area. Santa Cruz is a 45 minute drive from Monterey, silicon valley 90 minutes or so. I'd be glad to recommend a restaraunt for this, I've lived in the area since 1977.. One of my favorite places down there is a superb Chinese restaraunt in Carmel, but this would only be suitable for 8-12 people max. There are lots of other good places down there, or if folks wanted to drive a *few* miles, we could meet in Moss Landing at Phil's Fish Market for the best chowder and choppino on the west coast (and all kinda other fresh local seafoods as well as some pasta dishs for those who won't eat fish). Phil's is quite large, and if we have a headcount, reserving the back area on a tuesday shouldn't be too tough. I think this would work for 20-30 folks there. _ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39)
"John R Pierce" <[EMAIL PROTECTED]> writes - > Can anyone come? Announce it on the list if you do it. - > Where abouts are they held? - -- I will if I can. Depends on the date and family conflicts and where in the - rather sprawling SFBA it is... I'm in Santa Cruz, so naturally would prefer - points towards the south end of the Bay Area... The Western Number Theory Conference http://home.earthlink.net/~bartgoddard/mainpage.html meets in Monterey (acutally Asilomar) Sunday-Thursday December 16-20. It is four weeks away, so some out-of-town attendees may not have bought air tickets yet and might be able to stop between the SFO/OAK/SJC airports and Monterey. If the Mersenne gathering is in Silicon Valley around 4 pm on Thursday December 20, then attendees will have time to get from Monterey to the event, and still have time to get to SFO two hours before a red-eye flight to the east coast. The meeting location will need storage for luggage. If the gathering is in the Santa Cruz/Monterey area, it should be the afternoon of Tuesday December 18, which is a free period for conference attendees. Point Lobos and the Monterey Aquarium are the most common destinations on these afternoons. I reside in Marin County, north of San Francisco. I rarely attend evening (as opposed to multi-day) events in Silicon Valley, since it is too hard to get home after the last evening commute buses leave San Francisco. Plus, if I eat near Mountain View, I'll need to use the toilet when I reach San Francisco, but the Transbay Terminal toilets are closed at night. Peter Montgomery _ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39)
> Can anyone come? Announce it on the list if you do it. > Where abouts are they held? I will if I can. Depends on the date and family conflicts and where in the rather sprawling SFBA it is... I'm in Santa Cruz, so naturally would prefer points towards the south end of the Bay Area... _ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Mersenne: Re: [Mersenne] celebrate
On Sun, Nov 18, 2001 at 01:09:18PM -0500, Jud McCranie wrote: >I should have suggested this yesterday, but let's have a meteor shower to >celebrate the probable discovery of a new Mersenne prime! Big, big disappointment here in Norway -- I was outside for about an hour during the "maximum", _nothing_ to be seen. No clouds at all, perfectly clear, but not a single meteor. :-( Let's hope the prime verification goes better ;-) /* Steinar */ -- Homepage: http://www.sesse.net/ _ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Mersenne: [Mersenne] celebrate
I should have suggested this yesterday, but let's have a meteor shower to celebrate the probable discovery of a new Mersenne prime! +-+ | Jud McCranie| | | | Programming Achieved with Structure, Clarity, And Logic | +-+ _ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: hi everyone
At 04:17 PM 11/18/2001 +, Daran wrote: >In general, number theorists do not give much credence to conjectures of >primality based solely upon the values of the first few elements of a >sequence. I cannot help wondering if this is the sequence M(2), M(M(2)), M(M(M(2))), etc, which is indeed prime for all terms even vaguely capable of testing at the present time. The problem is that 90 digits in the exponent seems high for M(M(127)), the next term in the sequence. Nathan _ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39)
[EMAIL PROTECTED] wrote:
> Spike Jones (hey, Spike!) wrote
>
> >Lets have a Bay Area GIMPS party!
> >Same place as before? Ill have the prime rib. {8-] spike
>
> I'm game (well-seasoned venison, in fact :), but I believe
> Luke Welsh is in worker drone limbo somewhere in the
> Pacific northwest. Luke, can get your Weissbier-guzzling
> butt down here for a little PrimeFest before the years' end?
>
> If not, Spike and I (and anyone else who cares to join us)
> will have to party without you, and where's the fun in that?
Can anyone come? Announce it on the list if you do it.
Where abouts are they held?
Cheers... Russ
_
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Re: Mersenne: hi everyone
- Original Message - From: "jowy" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 15, 2001 12:42 PM Subject: Mersenne: hi everyone > Hi > > I subscribed yesterday to the Mersenne mailing list. I'm a french student, > and I'm very interested in mathematics and arithmetic. I worked with friends > on a sequence of number which we suppose to give only prime numbers. > It works for the 6 first numbers of the sequence, but I grows very fast. > The 7th would be a 90 digits exponent. What do you mean by "90 digits exponant"? That your number has 10^90 digits? That it has about 10^90 bits? > Is there a way to test this number? With Lucas Lehmer? Gauss? Given that the largest verified prime has about 10^6 digits, and that we are currently testing numbers up to about 10^7 digits, I would be surprised if there was a practical way to prove your number prime. There may, however, be a simple way to prove it composite, or otherwise to prove your sequence not always prime, using algebraic or number-theoretical techniques. In general, number theorists do not give much credence to conjectures of primality based solely upon the values of the first few elements of a sequence. Regards Daran G. _ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Fw: The Mersenne Newsletter, issue #18
- Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Thursday, November 15, 2001 5:38 AM Subject: Mersenne: Fw: The Mersenne Newsletter, issue #18 > Brian Beesley wrote: > > Eh? Doesn't it make more sense to concentrate on factoring > > Mnumbers that haven't yet been L-L tested? That way "success" in > > finding a factor reduces the number of LL tests, as well as > > (eventually) the number of double checks. Not necessarily. The marginal benefit/cost ratio of doing factoring work on exponant x awaiting a first time test, is twice what it would be if exponant x were awaiting a DC. This does not mean that it is greater that doing factoring work on exponant y which is awaiting a DC. > Surely you don't mean to suggest that someone who receives a PrimeNet > double-checking assignment that starts with some trial or P-1 > factoring > should stop, return that DC assignment to PrimeNet, then specifically > request an assignment of factoring a Mnumber that hasn't yet been L-L > tested, because that would make more sense than doing the second round > of factoring on the once-L-Led Mnumber, do you? :-) Ideally, the program 'should' only do factoring work up to the point where the benefit/cost ratio equals 1, which means that it 'should' factor to a lower level for DCs than for comparible 1st time tests. The amount of factoring that actually has been done might be lower still. Whether the program actually works like this is another matter entirely. > Another way of looking at what those to whom I referred are doing is > that we (I'm there)... As am I. > ...are performing the extra-factoring portions of > potential future DC assignments. If we don't do that, whoever gets > the future DC assignment will do it, Perhaps they won't. What I'm doing at the moment is collecting heaps of DC exponants, P-1 factorising them, then returning them un-DCed to the server. My reasoning is that many of the machines doing DCs will be older computers with relatively small amounts of memory. These will not be able to do stage 2 P-1 factorisation as effectively as I can with 512MB RAM, if they can do it at all. Therefore I am doing work which might not otherwise get done. [...] > As an old punchline goes: "If you don't, someone else will!" Ahem. Or not. > Richard B. Woods Daran G. _ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
