[EMAIL PROTECTED] wrote:
Steve Harris (with
Alex Kruppa for moral support and more importantly, to
run the tap and make sure the Steins
stayed filled) wrote:
Since this post has nothing to do with mathematics or primes, do
post me offlist if you know the answer.
Someone gave me a german beer
Rosenfeld
Shelly Jones
Spike Jones
Scott Kurowski (who most generously bought dinner for
the whole crew)
Donald Knuth (yes, THE Donald Knuth)
I tried to introduce myself to Professor Knuth, but Im afraid
Im not good in the presence of greatness, so I stammered
like Ralph Kramden: Hello professor
Todd Sauke wrote:
I'm up for joining a get-together in the San Jose/Mountain View area
depending on specific timing. Wasn't there a previous at the Tied House in
Mountain View? That would be great for me. Todd Sauke
OK. Lot of us are going to Gramma's for Thanksgiving. Lets shoot
for
Spike Jones (hey, Spike!) wrote
Lets have a Bay Area GIMPS party!
Same place as before? Ill have the prime rib. {8-] spike
[EMAIL PROTECTED] wrote: I'm game (well-seasoned venison, in fact :),
...little PrimeFest before the years' end?
If not, Spike and I (and anyone else who cares
I have been wanting to do that number theory conference in Monterey.
Perhaps invite the number theorists to join us?
Alternate suggestion: have a small gathering of the locals at the
Tied House in Mountain View some weekday evening the week
after Thanksgiving, and do still get together at the
George Woltman wrote: ...I'll see if I can't get Ernst
Mayer to do the official different program - different CPU architecture
verification
Speaking of Ernst Mayer, lets have a Bay Area GIMPS party!
Same place as before? Ill have the prime rib. {8-] spike
I have been tracking the daily performance of GIMPS for
some time. I predicted what we are seeing this week: a
surge in performance of Primenet/GIMPS which I think
is due to students returning to campus and starting
up their machines. We saw this last year right at around
26-28 September.
Many
There is an article this in the new Scientific American on distributed
computing, but no mention of GIMPS. I feel cheated. spike
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Mersenne Prime FAQ --
Matt Goodrich wrote:
Anyone else having trouble hitting the web server??
I was, earlier, but now it seems to be working again. spike
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Mersenne Prime FAQ
You may have heard that our so-called Governor, here in the
great state of Taxifornia has proposed replacing rolling
blackouts with universal brownouts: reducing line voltage
about 10-15% on hot days this summer. Any guesses
at how that will effect a computer running GIMPS?
spike
Hans Riesel wrote: Hi everybody,
If 2^p-1 is known to be composite with no factor known, then so is
2^(2^p-1)-1.
Hans Riesel
It has been a long time since I have seen a more elegant
argument ender than this. Thanks Hans! spike
Nathan Russell wrote:
http://www.half-empty.org/servlet/LoadPage?pageID=ideaideaid=1644sortmode=3viewmode=3
I thought the prime community might want to stop by and take a look
at
what's been said.
Nathan I liked your comment about the largest genuine composite:
a number known to be composite but
Scott Kurowski wrote:
P.S. if there are any GIMPS folks on this list nearby, I'll treat lunch or
beers... I left Ernst and Luke in Silicon Valley. :-(
___
Speaking of Silicon Valley, its past time we had another GIMPS
party up this way. I was planning
One of my machines is acting up. Testing in the 10.6 millions on a
350 MHz Pii, so I would expect iteration times about in the mid 4s,
such as 0.44 seconds. I was getting interation times about twice
that, even tho I had everything turned off, restarted etc. Then I
went into task manager
A few weeks ago, I thought someone posted something like:
2^n-1 where n is prime cannot have any factor smaller than n.
Did I get that right? Is there a simple proof? spike
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GIMPS allows us to use some unfamiliar prefixes. For instance, we
are much cheered by our recent landmark of exceeding 1 trillion
operations per second, 1 teraflops. Consider the total floating point
operations performed by GIMPS. We finished our first petaflop
(quadrillion floating point
at least in the near-term one could then simply compile one of the H
(High-level-language Lucas-Lehmer; how's that for a tortured acronym? :)
No, because if we did that, the whole project would go to H. spike
_
Harald Tveit Alvestrand wrote:
one of the amazing things I discovered some years ago when browsing the
website of the Institute for Earth Rotation (!) is that leap seconds can't
be predicted more than approximately 5 years in advance.
it's a strange world.
Not so strange. The rule that
Here we go guys...
http://dailynews.yahoo.com/h/nm/2315/tc/science_quantum_1.html
If quantum computing becomes possible, we may someday LL
all the Mersenne numbers simultaneously. spike
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Aaron Blosser wrote:
...I happened to be viewing a list of processes on my NT machine today
(using
the fabulous PSLIST from www.sysinternals.com) and noticed that
NTPRIME.EXE
shows a priority of 8 (normal), but has 2 threads...
With a modern desktop confuser the idle processes use ~98% of the
Ive been offered a few machines, but I want em ALL! spike
Aaron Blosser wrote:
I'm glad you're doing it the "right" way, compared to the way I did it. :-)
http://www.sciencenews.org/2304/bob1.asp
Aaron, its *because* of your experience that I am going the
slow legal way. {8-]
Spike Jones wrote:
play, there might be some very good reasons to *not* show up
in the top contributors list. In fact, the someone who organized
Russ asked: What might those reasons be?
Well, if it is a reeelly big company, the contribution of that one
might discourage the individual
Nathan Russell asked: How much are the people who are trying to
find a 10 million digit prime contributing to the search?
Any machine that is running GIMPS is contributing to mapping
the great universal math-space. If one is factoring, double checking,
finding a slew of Mersenne composites (I
Nathan asked: How much are the people who are trying to find a
10 million digit prime contributing to the search?
Now that you asked, I have been pondering this point. The
payoff structure offered by the EFF has in some ways been
a hindrance to GIMPS as well as a motivator. It is aesthetically
Well, those two local companies are at it again. The one from
Santa Clara announces a 1.1 GHz chip, then the one from
Sunnyvale announces a 1.5 GHz chip. GIMPS is gonna be
smoking once those two guys start shipping these hummers.
spike
[EMAIL PROTECTED] wrote:
per second. Lets get with it! My model predicts
we will hit 2^40 in May. {8-] spike
What's this number "40"? Shouldn't it be 2^(2^6-1) ? :)
ummm, no. but i would buy 2^(2^(2^2+1)+2^(2^1+2^0))
{8^D spike
Luke Welsh wrote:
BTW, PrimeNet has reached a sustained teraflop! Are we gaining
members, are we upgrading our hardware, is it George's
faster v19 code, is it people running Ernst's code, or some/all
of the above?
Yes, so the *real* milestone is less than 10% away. The real
milestone is
I did not find in the faq where one can reserve a number of 1E7 digit
primes.
I was able to sell the notion of running GIMPS to the IT people at my
job, but only by offering the possibility of a monetary prize. Please,
how may I reserve about 50 1E7 digit primes that have been prechecked
for
Processor gurus, please: using the equivalence that is suggested
by the primenet status page [86.6 P90 CPU yr/day = 1042 GFlops]
I calculate that a floating point operation must be about 3 CPU cycles.
Is this true? Exactly? Always? Only for pentia? Only for
Lucas Lehmer calculations? spike
The SF Bay area GIMPSers got together this evening for
a pleasant time of fellowship and dinner at the Tied House.
We all had the prime rib...
{8^D spike
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Mersenne
But if I were to be sprayed with beer by Knuth I would consider it
the greatest day of my life! If I were to see him I fear I would fall
prostrate upon the earth, crying "Im unworthy! I sck!"
{8^D spike
(: .oot gniddik m'I)
[EMAIL PROTECTED] wrote:
I wanted to invite Don Knuth,
[ Joth Tupper explained] ...why we cannot stop in the "middle"
of a Lucas-Lehmer test. The essential answer is that we
know a property of particular terms in the sequence 4, 14, 192...
given recursively by squaring and subtracting 2
I understand this now, but I didnt when I first
Instead of a boring status bar, how about a graphic of a
caterpillar gnawing away on a leaf? It starts out as a full
leaf and disappears as the little beastie devours his sustenance.
Have an outline of the original leaf for size comparison.
That would be cool: have it turn into a butterfly at
Nick Craig-Wood wrote: If one had the data then it would be reasonably
easy to calculate the expectation (in $ per year) for a given exponent
size CPU.
Nick, I worked this out a few months ago when the prizes were
announced. Using a pentium II/400 the mathematical expectation
for those
The program is OK, I just overlooked the fact that there are in fact
odd abundant numbers. doh! spike
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Mersenne Prime FAQ --
With every Mersenne number there is an associated perfect
number, the sum of whose factors exactly equal the number.
I discovered a fascinating thing today, for which I must introduce
some new terminology.
If a number is greater than the sum of its factors, let it be a cold number.
If a number
George Woltman wrote:
4) The discoverers of any Mersenne primes between now and the 10,000,000
digit discovery. This will encourage an orderly exploration of the exponents
and keep up interest over the coming years.
You have anticipated my idea, George. The EFF awards should have been
Chip Lynch wrote:
Have a party... wouldn't YOU like to meet the other people working with
GIMPS? Frankly, this wouldn't be THAT expensive, and we could even make
it a symposium or something call for papers or research in the area of
computational number theory.
Great idea Chip! I
Eric Hahn wrote: For those of you who are interested, the San Jose
Mercury News has published the story.
http://www.mercurycenter.com/premium/scitech/docs/prime06.htm
Yes, they did but I was disappointed in the article. No mention of
the GIMPS site! {8-[ All those SETI plugs! {8-| Lets
Geoffrey Faivre-Malloy wrote:
Has anyone calculated (given the current rate of growth) how long it
will
take to do 1st level LL tests up to 20 million?
Gman, I extrapolated and posted an estimate of April 2007, back in
February
of this year. If I take a linear model starting 1 Jan 99, I get
Simon Burge wrote:
I haven't saved the world, but I'm still having a good time, and to me
that's what GIMPS is all about. I'd hate to see that disappear...
Altho we all want to test fresh numbers, they *all* eventually need to be
double checked by self sacrificing souls. Bless you Simon.
I suspected that existence of SETI@Home would somehow benefit
GIMPS in the long run, and now I see how it might happen: SETI@Home
is a dog compared to GIMPS. It doesnt get outta your way when
you want your computer's undivided attention, and now it appears
they have been handing out the same
Petri Holopainen wrote:
..."primitive" civilizations like ours. In that case, SETI would be
pointless. But it would be pretty sad if we didn't even *try* to find
them...
What if... SETI@home does manage to find ET. Then historians
will realize that the concept of distributed computing was
Spike Jones wrote: ...What if... SETI@home does manage to find ET...
There is yet another way to look at this. From reading the GIMPS
posts on SETI, it is clear that many are seeing SETI as a competitor
for idle CPUs. Yes, it is that, in a sense. I see that SETI@home is
getting nearly
David L Nicol wrote:
Have we any code gurus that can help us out here? spike
I'm not going to do this one. Spike, if you search for base-64
encoding libraries you'll find several you can slightly mutate to
get what you want, similar to base64 (MIME) encoding as it is...
I thought of
Let category 1 GIMPSers be set that contains those GIMPSers that
use a number of commercially owned or institutional computers, such
as the champion TempleU.
Let category 2 GIMPSers be set that contains those GIMPSers that
use a combination of commercial and home computers.
Let category 3
So these were the exponents that old Mersenne *thought* were his
namesakes? spike
Luke Welsh wrote:
At 10:01 PM 3/1/99 -0800, you wrote:
Im stumped. What is 2, 3, 5, 7, 13, 17, 19, 31, 67, 127, 257... ? spike
Gotcha!
http://www.scruznet.com/~luke/lit/lit_069s.htm
George Strohschein wrote:Even a typical insect brain has many times the
computing power of our best PCs.
Perhaps, but the bugs are using their brains for such mundane things,
such as building anthills and buzzing manure, whereas our PCs are
calculating and accumulating knowledge. Besides, our
Wojciech Florek wrote: If you are intersting in these plots browse to my
page
http://main.amu.edu.pl/~florek
You can download pictures in *.gif *.ps and *.tex format.
Wow thanks Wojciek! Great web site.
I know that we have many active GIMPSers all over the U.S., Australia
and Europe. Are
Earlier I posted the notion that Mersenne primes might be used to
impress extraterrestrial civilizations. After thinking it thru, I think we
can make a stronger arguement than that: Mersenne primes might
be the *best* yardstick to *prove* a certain level of technological
achievement, perhaps
i see the new top producer is TempleU-CIS. i assume
this is temple university in pittsburg pennsylvania. i conjecture
that cis is computer information security? congratulations
templeU-CIS. how did you do it? spike
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[EMAIL PROTECTED] wrote:
i like the idea of finding larger and larger prime numbers but i still
dont know what this will do for modern mathematics
i thought of a good reason to have enormous prime numbers:
we would use them to impress extraterrestrial intelligences, should
we ever manage
If a automatic statistics history file containing a log of
daily throughput rates was put up, one of us could probably
write a script to produce an automatically updated graph
similar to the one on http://entropia.com/ips/stats.html
Kevin Sexton
kevin, i asked entropia.com for this data a
is the raw data available that went into the chart near the bottom of
http://entropia.com/ips/stats.html
? i wish to do some fourier transforms on that data, in the
form of date vs daily gimps cpu yrs/day. there may be some
wonderful insights yet undiscovered in this data. thanks! spike
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