20090302, 08:20  #1 
Feb 2009
49_{16} Posts 
100M digits, how much trial factoring will it do?
How many bits can I expect it to do trial factoring up to, until it starts the P1 step? (2^74? 2^77?)
(just for reference, v25.8 build 4) I used Manual Assignment from the web page, and pasted it into worktodo.txt It reports the results automatically, right? I read through the forum, but it's not clear. The software and web page has been updated a lot since some of the forum posts were written. Last fiddled with by xorbe on 20090302 at 08:26 
20090302, 08:54  #2  
"Richard B. Woods"
Aug 2002
Wisconsin USA
7692_{10} Posts 
Quote:
#define FAC78 337400000L that means exponent 337,400,000 (101,567,520 decimal digits) is the dividing point between TF limits of 2^77 and 2^78. However, those are the ultimate total limits. Prime95 and PrimeNet assignments now stop TF 2 bits short of that limit, then do P1, then do the final 2 bits of TF. So, for an exponent slightly under 337,400,000, I'd expect TF to 2^75, then P1, then TF from 2^75 to 2^77. Quote:
Last fiddled with by cheesehead on 20090302 at 09:02 

20090302, 19:06  #3 
Feb 2009
73_{10} Posts 
Wow...
2^72: 1.4397 GHz·days 2^73: 2.8793 GHz·days 2^74: 61% done So, at 3.66 GHz, 7577 are going to take 3.1, 6.3, 12.6 days. I notice the workload page says "1943 days to go" for the exponent, hrm that's a long time... 
20090302, 20:31  #4 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
3×13^{2}×19 Posts 
That workload page aint lying. 56 core years? Sounds about right, give or take a few years.
Please drop a note later, how much time the P1 will have taken... Also, here's a bit forgotten thread  useful to read... http://www.mersenneforum.org/showthread.php?t=11037 
20090303, 02:42  #5 
Feb 2009
73 Posts 
According to Advanced > Time, LL will take about 1 year, 2.6 months (444 days)  with 8 threads anyways. That's actually doable. 1 thread was estimated 1725 days. Depending whether P1 step is after 2^75 or 2^77, I'll report the P1 time estimation in 413 days from now...
Last fiddled with by xorbe on 20090303 at 02:48 
20090303, 10:35  #6 
Feb 2009
111_{8} Posts 
Huh, if I manually set the affinity of the thread doing TF, it runs 10% faster.

20090307, 23:18  #7 
Feb 2009
73 Posts 
Too bad we can't edit posts after a while. Otherwise, I would update the first post in this thread with the answer that it started P1 stage 1 after TF to 2^75. Instead an interested person will have to scan down the thread...
M(332197123), P1 stage 1 was at 4.6% today, and looks like it's going to take 6.5 more days, and "Chance ... 6.05%". Last fiddled with by xorbe on 20090307 at 23:21 
20090308, 18:07  #8  
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}×3×641 Posts 
Interested persons won't have any trouble  this forum's software makes it easy to find, and go to, new unread posts.
Quote:


20090308, 22:00  #9 
Feb 2009
73 Posts 
I estimated the time manually with a calculator (from onscreen % and time info) only for Stage 1  no idea about Stage 2 until it gets there...
Last fiddled with by xorbe on 20090308 at 22:01 
20090309, 01:27  #10 
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}×3×641 Posts 
So you're not clicking on Test>Status to see the estimated completion dates?

20090309, 06:38  #11  
Feb 2009
73 Posts 
Quote:
About 21% now, on track to complete P1 Stage 1 around next weekend I guess... Last fiddled with by xorbe on 20090309 at 06:41 

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