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1) Message boards : Problems and Help : I can't abort a SoB task (Message 125389)
Posted 976 days ago by Matt Westwood
Many thanks.
2) Message boards : Problems and Help : I can't abort a SoB task (Message 125387)
Posted 976 days ago by Matt Westwood
I've set up my PrimeGrid preferences to select a subset of the projects (with a view to getting everything up to Gold status), and these preferences do not include Seventeen or Bust.

But I find that my next task lined up is a SoB LLR task (sent 24 Jan 2019 | 19:20:38 UTC).

I appreciate that this is a Focus project, and that we're (collectively) keen to clear a big backlog. But at this stage I don't want to run one, as I have other things I'd prefer to do.

I have tried to abort this project before it actually starts, but clicking the work unit number (592572600) gives me "suppressed pending completion".

So how can I abort this task before it starts so as not to waste any calculation time?
3) Message boards : Number crunching : Conjunction of Venus & Jupiter Challenge (Message 124222)
Posted 997 days ago by Matt Westwood
Point taken. I'll leave the games to the big boys.
4) Message boards : Number crunching : Conjunction of Venus & Jupiter Challenge (Message 124206)
Posted 997 days ago by Matt Westwood
While it is appreciated that the only participants likely to have any chance of winning are those with highly performant machines, it is still fun for those of us with more modest setups to participate. The problem with the last few challenges is that the assigned tasks are so large and take so long on our machines that we cannot complete even one task in the time allocated.

It is more pleasurable for us lowly amateurs to participate if we have the chance of getting *some* placement on the scoreboard. We would hate to feel we were somehow a nuisance, getting in the way of the serious competitors, in the way that small children at a skateboard park get in the way of the big boys. However, if the admins decide that our efforts are not really needed on these challenges, we can stay clear if that is best.
5) Message boards : Number crunching : Oktoberfest Challenge (Message 120688)
Posted 1100 days ago by Matt Westwood
7 days is hardly long enough for those of us with non-high-end boy-toys to run sufficient Cullen tests to register on the list at all. For these jobs which are larger than some others, can we have a longer period so as to get some more jobs run?
6) Message boards : Problems and Help : Sudden slowdown of machine (Message 104170)
Posted 1704 days ago by Matt Westwood
It has all become significantly clearer.

It appears that the estimated time to completion is way overestimated.

Of my 4 tasks, one has taken 6 days to reach 23% completion, and is showing a further 78 days estimated time left. But at current speed, it will take nearer 25 days. Similar numbers for the other 4 jobs, the longest of which will probably take just a hundred days (working at a rate of 1% per day), not the 380 now estimated.

Thank you for your response. I will keep things as they are and just let it rip.

7) Message boards : Problems and Help : Sudden slowdown of machine (Message 104073)
Posted 1707 days ago by Matt Westwood
I have just got myself a new computer (an Acer Aspire XC-705 with a, Intel i3-4170 running at 3.7 GHz and 6G of RAM, running Windows 10) , and running PrimeGrid on it was one of the first things I did.

A couple of days later I installed my backup software on it (Passport Ultra) and at the same time changed from McAfee antivirus to my existing AVG subscription for my anti-virus software. I have also linked to the Gridcoin pool. However, having done that, I have found that my performance has been reduced more than fourfold: from taking an estimated 22 days to run a Genefer 21 and 90 days for a Genefer 22, it is now estimating me 89 days for the former and 390 days for the latter.

I am having difficulty with the concept that, having practically nothing else running on my computer, the backup and AV software cause such a performance hit.

The other option is that somehow it is suddenly only using 1 of the 4 processors (? not sure of the details here) and that the others have become unavailable in some way. Looking at Task Manager I can see that the 4 PrimeGrid processes are each running at between 21 and 23 % CPU, which itself is running at 99% capacity.

If I hadn't had my processes running 4 times as fast before 2 days ago, I would accept the state of affairs, but because I know I had this machine running considerably faster than this (unless the original numbers were inaccurate). I was running TRP Sieve tasks in about 2.5 hours each last week, to get an idea of how fast it was, I only started running Genefers a couple of days after that.

Is anyone able to offer advice here?
8) Message boards : Problems and Help : Details of job on Riesel Sieve -- how to get info? (Message 103780)
Posted 1713 days ago by Matt Westwood
I have just joined, and with my brand new computer I have just run my first job. It was par of the Riesel Sieve project, and I have a goodly number of similar tasks in my queue.

But while I have looked all through the job descriptions, I can't find out exactly what it is that I have done. What n for what k have I just established that k2^n-1 is composite?
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