20210502, 05:14  #1 
"David Kirkby"
Jan 2021
Althorne, Essex, UK
321_{8} Posts 
What happened with exponent 109797829?
Looking on my hard drive I see various file for the exponent 109797829,
Code:
[dkirkby@jackdaw gimps]$ ls lh *109797829* rwrwr. 1 dkirkby dkirkby 40M Feb 17 02:03 p109797829 rwrwr. 1 dkirkby dkirkby 40M Feb 17 02:02 p109797829.bu rwrwr. 1 dkirkby dkirkby 27M Feb 17 01:58 p109797829.bu2 rwrwr. 1 dkirkby dkirkby 27M Feb 17 00:30 p109797829.bu3 rwrwr. 1 dkirkby dkirkby 27M Feb 16 23:57 p109797829.bu4 rwrwr. 1 dkirkby dkirkby 3.3G Feb 17 01:58 p109797829.residues [dkirkby@jackdaw gimps]$ https://www.mersenne.org/report_expo...exp_hi=&full=1 However, on 20210414, curtisc did a PRP test of the exponent. I'm wondering how I "lost" this exponent. I would have thought I would have longer to complete it, especially given I'd clearly started it. The exponent is not in my worktodo.txt file. I don't have a log file that goes back this long. I guess there's nothing more I should do than just delete the files associated with the exponent, but I would like to know what happened in this instance. Dave 
20210502, 05:51  #2 
P90 years forever!
Aug 2002
Yeehaw, FL
2^{2}·1,873 Posts 
I can't answer about why you lost the exponent. However, I can tell you that curtisc did not do a PRP with proof. Thus, the exponent does need a doublecheck.
If you have not deleted the save files, you can finish your test as the needed doublecheck. Simply add the line "PRPDC=1,2,109797829,1,88,0" to your worktodo.txt file. 
20210502, 05:53  #3 
P90 years forever!
Aug 2002
Yeehaw, FL
7492_{10} Posts 
If you finished P1 on 2/16 and lost the exponent on 2/17, you may not be far enough along with the doublecheck to make this effort worthwhile to you.

20210502, 09:59  #4 
"David Kirkby"
Jan 2021
Althorne, Essex, UK
11×19 Posts 
Thank you Prime95.
I thought one of the main advantages of the PRP test vs the LL is that the PRP provided a proof so did not require a doublecheck. So why would curtisc not perform the proof? * Maybe it is faster not to complete the proof? * Maybe it saves upload bandwidth? I just stuck the line you wrote in my worktodo.txt file as a doublecheck, and see it would take me 38 hours to complete a doublecheck, as it's "only" 19.39% complete. Code:
[Worker #1 May 2 09:44] Iteration: 21300000 / 109797829 [19.39%], ms/iter: 1.546, ETA: 38:00:24 [Worker #2 May 2 09:46] Iteration: 26400000 / 110826539 [23.82%], ms/iter: 1.555, ETA: 36:28:32 Code:
[Worker #1 May 2 10:19] Iteration: 72700000 / 110825977 [65.59%], ms/iter: 1.647, ETA: 17:26:23 Looking on the server now https://www.mersenne.org/report_expo...exp_hi=&full=1 I see it indicates I was assigned the doublecheck today, but I will abandon that. Is there any way for a typical GIMPS user, without special privileges, to look at an exponent and see if a PRP proof was uploaded or not? Dave Last fiddled with by drkirkby on 20210502 at 10:26 
20210502, 12:52  #5 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
2·3^{3}·5·19 Posts 
Please finish the needed PRP DC. You have a head start over anyone else of ~25%.
Curtisc's run may not have done a proof, because it may not have had adequate disk space allowed. PRP proofs require multiple GB of space reserved in prime95 or mprime, and some of U of Central Missouri's lab computers may just not have enough to spare, or their prime95 instances may not all be configured to allow it. https://www.mersenneforum.org/showpo...45&postcount=4 P1, PRP, and PRP DC can be separate assignments. Last fiddled with by kriesel on 20210502 at 12:53 
20210502, 14:59  #6  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
61·157 Posts 
Quote:


20210502, 15:13  #7  
"David Kirkby"
Jan 2021
Althorne, Essex, UK
11×19 Posts 
Quote:
Prime95 wrote earlier than given I had done the P1 test one day, and lost the PRP test the next day, the amount of work done may not be worthwhile doing a doublecheck. I concluded what he wrote was true, as I had only completed 19%. not 25%. I've deleted the files, so can't do a doublecheck now without repeating it from scratch. Dave Last fiddled with by drkirkby on 20210502 at 15:21 

20210503, 07:19  #8  
"Alexander"
Nov 2008
The Alamo City
5×11^{2} Posts 
Quote:


Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
What happened to the M47?  dabler  News  16  20180612 21:45 
n=500000 what happened?  cipher  Twin Prime Search  2  20090715 01:15 
What happened to my stats?  BranMuffin  PrimeNet  4  20081119 22:33 
what happened?  ixfd64  PrimeNet  26  20060215 23:50 
What happened?  ThomRuley  Lone Mersenne Hunters  7  20030731 16:31 