20210218, 10:28  #1 
"David Kirkby"
Jan 2021
Althorne, Essex, UK
455_{8} Posts 
Why can't I extend something that's certain to not complete in time?
Maybe I am stupid, but I set up a manual assignment to do a LL test with an exponent of 332,311,079
https://www.mersenne.org/report_expo...2311079&full=1 According to my CPU screen, this has been running one day, completed 1.5%, and will take 94 days to complete. However, according to the "Assignment Expiration Details", this will expire in 60 days. I have tried to extend the expiration date, but every time I do this, the server reports it has done it, but it is still shown as expiring in 60 days. It's clear I can't complete this in 60 days. 120 days should give me long enough, which does not seem an excessively long time given the exponent is large. See screenshots User 'yangyang6666' attempted this exponent before. It was assigned in 2016, he/she got 34% done 9 months later, and then let it expire in 2020. So yangyang6666 had it for 4 years, but I am limited to 60 days, which is too short. Dave Last fiddled with by drkirkby on 20210218 at 10:40 
20210218, 12:18  #2 
"Viliam Furík"
Jul 2018
Martin, Slovakia
210_{16} Posts 
Don't worry about the expiration, it will not expire. AFAIK, the assignment rules are not displaying correct expiration up there, and so far nobody bothered to fix it, because it is not at all a pressing matter. Someone else might correct me.
And also, please, stop the test, and restart it as PRP. As Kriesel already mentioned, in the previous thread, that it has better error checking capabilities, and most importantly, a proof of correctness is generated afterwards so that no doublecheck test is needed (unless it is a prime, of course). This should be a correct worktodo line for the test: Code:
PRP=N/A,1,2,332311079,1 
20210218, 13:53  #3 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
2·3·1,607 Posts 
Until your machine checks in, PrimeNet does not you are have actually started working on it. Try putting your assignment ID (that long random string in your line in your worktodo.txt file in place of the N/A in Villiam's example and run the PRP. The assignment type is close enough that PrimeNet should be ok with it.

20210218, 16:31  #4 
"David Kirkby"
Jan 2021
Althorne, Essex, UK
7×43 Posts 
Em,
I'm confused by this. I thought it wise to unassign the exponent, as the server might get confused with me requesting to do one test, then changing it to something else. Now I get the message below when I try to request that exponent. The funny thing is, if I put that exponent as a minimum, and leave the maximum open, it finds me a larger one to do. What sort of resources will I need for this  particularly in terms of disk space? I have 2 GHz CPU, 26 cores and 64 GB RAM. Error text: No assignment available meeting CPU, program code and work preference requirements, cpu_id: 2399764, cpu # = 0, user_id = 244634 
20210218, 16:34  #5 
"David Kirkby"
Jan 2021
Althorne, Essex, UK
100101101_{2} Posts 
I was expecting if I set my exponent as the minium, and maximum, it would give me that one to do, given nobody else is doing it, and I have unassigned it myself.
Perhaps I would have been better not unassinging it to myself, but then I did not want to confuse the server, which is why I did it. I don't really want to test an even bigger one! Is PRP slow/faster than LL on exponents of that size? 
20210218, 16:36  #6  
"Oliver"
Sep 2017
Porta Westfalica, DE
23^{2} Posts 
Quote:


20210218, 18:35  #7  
"David Kirkby"
Jan 2021
Althorne, Essex, UK
7×43 Posts 
Quote:
"Error text: No assignment available meeting CPU, program code and work preference requirements, cpu_id: 2399764, cpu # = 0, user_id = 244634" Yet for some strange reason, asking for a 100 million digit candidate to test, I get allocated a larger one! I can't really see the logic of that. I'm now doing 332646233 https://www.mersenne.org/report_expo...exp_hi=&full=1 which is larger, and has not been tested for factors of 2^77 or greater. Testing a smaller number, which had been tested for more factors seemed more likely to find a prime to me. I'm quite puzzled how the assignments are given out. Why should I not have the resources to do a certain size exponent, but have them to do a larger one? Dave Last fiddled with by drkirkby on 20210218 at 18:39 

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