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POTM August '10 - Collatz Conjecture
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LanDroid
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PostPosted: Sun Aug 01, 2010 3:53 am    Post subject: POTM August '10 - Collatz Conjecture Reply with quote

Quote:
Collatz Conjecture is a research project that uses Internet-connected computers to do research in mathematics, specifically testing the Collatz Conjecture also known as 3x+1 or HOTPO (half or triple plus one). ... It can run on an nVidia GPU, ATI GPU, or CPU.

Quote:
The Collatz conjecture is an unsolved conjecture in mathematics named after Lothar Collatz, who first proposed it in 1937. ... Take any natural number n. If n is even, divide it by 2 to get n / 2, if n is odd multiply it by 3 and add 1 to obtain 3n + 1. Repeat the process indefinitely. The conjecture is that no matter what number you start with, you will always eventually reach 1. It has been called "Half Or Triple Plus One", sometimes called HOTPO.

http://en.wikipedia.org/wiki/Collatz_conjecture

Whoa, we're crunching some gigungous numbers: over 2.3 sextillion!
http://boinc.thesonntags.com/collatz/highest_steps.php
http://boinc.thesonntags.com/collatz/high_steppers.php

Starting stats:
16th place
367,717,783 points
1,054,460 RAC
383,665 points yesterday
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Gemjunkie
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PostPosted: Sun Aug 01, 2010 7:08 pm    Post subject: Reply with quote

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Killerrabbit
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PostPosted: Sun Aug 01, 2010 7:27 pm    Post subject: Reply with quote

Real numbers only starts at sextillion and above.

WUs take about 24 hours on my slow computer.

Ni
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Idan
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PostPosted: Mon Aug 02, 2010 5:02 am    Post subject: Reply with quote

Quote:
sextillion


Lol, you said a naughty word... #ni-1
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Gemjunkie
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PostPosted: Mon Aug 02, 2010 6:14 pm    Post subject: Reply with quote

I switched one shrubber from Folding to Collatz.

Is there any way to get BOINC to run under a regular account? Why does a simple number crunching program need an administrator's account? The box was checked during installation to allow anyone to control it and I even used the properties box under the administrator account to change permissions to everyone, but under a regular account I don't have permission to open it. Confused
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LanDroid
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PostPosted: Thu Aug 05, 2010 4:43 am    Post subject: Reply with quote

Production is up - 512.4K crunched yesterday. We need to watch Poland, they're 5 million points behind, but currently out-producing us almost 150K daily...
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Pooh Bear 27
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PostPosted: Thu Aug 05, 2010 5:33 am    Post subject: Reply with quote

I had an older ATI 2600 XT card that I am crunching with. It does a unit in just under 1.75 hours. I know it's not a lot, but at least it's a small amount of help, now that I got the dumb thing to work.
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Pooh Bear 27
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PostPosted: Fri Aug 06, 2010 6:13 am    Post subject: Reply with quote

I know there are a ton of faster video cards that my 2600 XT, but does it really take nearly 1.75 hours on this or are there some setting tweaks I am missing?
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Gemjunkie
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PostPosted: Fri Aug 06, 2010 8:00 am    Post subject: Reply with quote

I'm getting 1.1 hrs on my low-power (underclocked) GT240.


Anyone see this?
www.amazon.com/Prove-Collatz-Conjecture-Danny-Fleming/dp/141160427X

Shocked
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Hal9000x86
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Location: The 10 milllion year project that will find the question to the answer 42.

PostPosted: Fri Aug 06, 2010 9:26 am    Post subject: Reply with quote

On my GT470 the cudas run around 10-20 minutes.
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stooper101
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PostPosted: Fri Aug 06, 2010 10:35 am    Post subject: Reply with quote

My mobile 5470 does one in 4 hrs 18 min.
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KWSN-HoC
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PostPosted: Fri Aug 06, 2010 2:36 pm    Post subject: Reply with quote

My HD 4850 just need 16-17 minutes ....

My HD 3450 needs around 6 hours .....

My GeForce 8600 GT needs around 3 hours .....

Cheers

HoC
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Gemjunkie
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PostPosted: Fri Aug 06, 2010 4:05 pm    Post subject: Reply with quote

HoC! Congrats on making yesterday's High Stepper list!
#ni-1
[/url]
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Hal9000x86
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PostPosted: Fri Aug 06, 2010 4:41 pm    Post subject: Reply with quote

5870 is 6:30 minutes
sadly my ati 3200 on my netbook can not do any project.
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LanDroid
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PostPosted: Fri Aug 06, 2010 5:48 pm    Post subject: Reply with quote

My 3 core CPU needs about 18 hours/ea so I may bail out of this one due to electrical/computational inefficiency... Maybe I need to buy one of those HD 4850'S...

I think we're in trouble, the Pollacks (are we allowed to say that anymore?) out HOTPO'd us by about 700K yesterday...

<= HOP TOAD
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PostPosted: Fri Aug 06, 2010 10:54 pm    Post subject: Reply with quote

my G-force 9800GTX is 34 min
the 940 Deneb chip runs about 10 hours per core
and the lappy does one in about 4 hours on the onboard video

I put one of the 9800's in a friends comp that is not on the net right now and the loss is made up by the addition of 12 cpu cores, but just barely
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Gemjunkie
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PostPosted: Sat Aug 07, 2010 2:06 am    Post subject: Reply with quote

I just put a Q9550/HD5770 shrubber to work on Collatz, 11.5min for the GPU.
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Pooh Bear 27
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PostPosted: Sat Aug 07, 2010 4:18 am    Post subject: Reply with quote

I added my NVidia GT220 and this is slower than the ATI 2600 XT?
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Gemjunkie
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PostPosted: Sat Aug 07, 2010 1:41 pm    Post subject: Reply with quote

The HD5770 was what I replaced the GT220 with, but I hadn't been using it for BOINC so can't compare.
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tiberius
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PostPosted: Sun Aug 08, 2010 2:44 am    Post subject: Reply with quote

Have just joined the fray a week late - a few more gpu's and cores to come when I get to work on Monday.

My HD5870 is taking 6.04 minutes, and my 8800GTX's are taking 58 minutes. Might be time to overclock the 8800's, although they're about to get a serious working over when I eventually get around to installing StarCraft II on the SLI box....
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