I noticed a couple of WU's had erred out when checking my work stats they have erred on several other machines besides my own so I am guessing they may be broken.

wu_sf3_DS-10x271_Grp518833of682667 http://numberfields.asu.edu/NumberFields/workunit.php?wuid=9955823

wu_sf3_DS-10x271_Grp491521of682667 http://numberfields.asu.edu/NumberFields/workunit.php?wuid=9902500

I noticed a couple of WU's had erred out when checking my work stats they have erred on several other machines besides my own so I am guessing they may be broken.

wu_sf3_DS-10x271_Grp518833of682667 http://numberfields.asu.edu/NumberFields/workunit.php?wuid=9955823

wu_sf3_DS-10x271_Grp491521of682667 http://numberfields.asu.edu/NumberFields/workunit.php?wuid=9902500

Thanks for reporting. I have removed those two from the queue.

I am aware of the problem. It happens to about 1 out of 10000 WUs, and is related to factoring the polynomial discriminant. Sometimes the polynomial under test has a very large prime factor in it's discriminant, and the factoring algorithm has problems with it. I end up running those special cases offline using a more robust (but slower) algorithm.

Finding a better way of dealing with this is on my list of things to do, but is a lower priority right now.

Good to know I will keep an eye out for these when I am running the project, the odds are pretty good that if there are any out there I will get them, since I run so many work units daily when running the project and rarely get errors. Perhaps I can be of some help in keeping the loss of cpu cycles down.

I went back and looked a little further in my history and I think the one listed below may be another one.

wu_sf3_DS-10x271_Grp464214of682667
http://numberfields.asu.edu/NumberFields/workunit.php?wuid=9843193

Good to know I will keep an eye out for these when I am running the project, the odds are pretty good that if there are any out there I will get them, since I run so many work units daily when running the project and rarely get errors. Perhaps I can be of some help in keeping the loss of cpu cycles down.

I went back and looked a little further in my history and I think the one listed below may be another one.

wu_sf3_DS-10x271_Grp464214of682667
http://numberfields.asu.edu/NumberFields/workunit.php?wuid=9843193

Yes, that was indeed another one. I also queried the database and found a couple more. For some reason they occur in groups. Sometimes I'll see nothing for 100,000 WUs and then there will be a cluster of bad ones.