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1) Message boards : Number crunching : International Day of Education Challenge (Message 136655)
Posted 4 hours ago by Profile Michael GoetzProject donor
Five and a ahlf hours to go...


Challenge: International Education Day
App: 12 (321-Sieve)
(As of 2020-01-24 18:28:22 UTC)

328030 tasks have been sent out. [CPU/GPU/anonymous_platform: 328030 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

2171 (1%) were aborted. [2171 (1%) / 0 (0%) / 0 (0%)]
694 (0%) came back with some kind of an error. [694 (0%) / 0 (0%) / 0 (0%)]
225407 (69%) have returned a successful result. [225413 (69%) / 0 (0%) / 0 (0%)]
99787 (30%) are still in progress. [99787 (30%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

61165 (27%) are pending validation. [61171 (27%) / 0 (0%) / 0 (0%)]
164234 (73%) have been successfully validated. [164234 (73%) / 0 (0%) / 0 (0%)]
0 (0%) were invalid. [0 (0%) / 0 (0%) / 0 (0%)]
8 (0%) are inconclusive. [8 (0%) / 0 (0%) / 0 (0%)]
2) Message boards : Number crunching : International Day of Education Challenge (Message 136639)
Posted 9 hours ago by Profile Michael GoetzProject donor

This is the first time we've run a challenge where ties were possible, the credit per task was not an integer, and the leaderboard generator automatically adjusted the ranks for tie scores, so we've never seen this problem before.

What about former sieve challenges and the AP last september?
Thanks, although I'm out of 300 now...😢😢


Mike already noted this in his post (I bolded the relevant section).



Also, although we have had fixed-credit non-integer challenges before, it's only been the last couple of years that the leaderboard software was smart enough to adjust the ranks of tie scores. Before that, if first, second, and third were tied, they would show up as 1, 2, and 3. It's only recently that the software was smart enough to change that to 1, 1, and 1.

Anyway, it should be fixed now. :)

Let me know if you see anything amiss. And thanks for finding this bug!!!
3) Message boards : Number crunching : International Day of Education Challenge (Message 136632)
Posted 10 hours ago by Profile Michael GoetzProject donor
Just a little side question:

285 GPV67 Carl Sagan 8 538.39 14
285 JakubH Czech National Team 8 538.39 14
287 paleseptember Free-DC 8 538.39 14
287 dannyridel AMD Users 8 538.39 14

Why would users with the same number of challenge credit have different ranks?


It's a problem with rounding errors in PHP. It thinks those scores aren't equal. I need to figure out how best to handle this.

Don't worry about the results, once I fix this, they'll be correct. There's no permanent damage.

This is the first time we've run a challenge where ties were possible, the credit per task was not an integer, and the leaderboard generator automatically adjusted the ranks for tie scores, so we've never seen this problem before.
4) Message boards : Number crunching : International Day of Education Challenge (Message 136629)
Posted 11 hours ago by Profile Michael GoetzProject donor
We've only just begun, but it's time to discuss the end of the challenge!


At the Conclusion of the Challenge

When the challenge completes, we would prefer users "moving on" to finish those tasks they have downloaded, if not then please ABORT the WU's (and then UPDATE the PrimeGrid project) instead of DETACHING, RESETTING, or PAUSING.

ABORTING WU's allows them to be recycled immediately; thus a much faster "clean up" to the end of a Challenge. DETACHING, RESETTING, and PAUSING WU's causes them to remain in limbo until they EXPIRE. Therefore, we must wait until WU's expire to send them out to be completed.

Likewise, if you're shutting down the computer for an extended period of time, or deleting the VM (Virtual Machine), please ABORT all remaining tasks first. Also, be aware that merely shutting off a cloud server doesn't stop the billing. You have to destroy/delete the server if you don't want to continue to be charged for it.

Thank you!
5) Message boards : Number crunching : International Day of Education Challenge (Message 136628)
Posted 11 hours ago by Profile Michael GoetzProject donor
In a couple of minutes we'll be halfway through the challenge. Here's what we've done so far:


Challenge: International Education Day
App: 12 (321-Sieve)
(As of 2020-01-24 11:45:35 UTC)

220888 tasks have been sent out. [CPU/GPU/anonymous_platform: 220888 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

1547 (1%) were aborted. [1547 (1%) / 0 (0%) / 0 (0%)]
376 (0%) came back with some kind of an error. [376 (0%) / 0 (0%) / 0 (0%)]
130907 (59%) have returned a successful result. [130910 (59%) / 0 (0%) / 0 (0%)]
88076 (40%) are still in progress. [88076 (40%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

46870 (36%) are pending validation. [46873 (36%) / 0 (0%) / 0 (0%)]
84025 (64%) have been successfully validated. [84025 (64%) / 0 (0%) / 0 (0%)]
0 (0%) were invalid. [0 (0%) / 0 (0%) / 0 (0%)]
12 (0%) are inconclusive. [12 (0%) / 0 (0%) / 0 (0%)]


Half a day and we've sent out 220 thousand tasks, and 130 thousand tasks have been completed. Normal for a full day is is about 27 thousand tasks, so depending on which number you want to use we're doing between 9 and 17 times what we normally do.

Someone will inevitably ask how much all of this advances the sieve, Each task does 10G of sieving, and since we double check these tasks, each task is effectively 5G. Every 200 thousand tasks is therefore 1P of sieving. Our original target goal was a depth of 167P, and on January 8th we were at 42P. As of this moment, we're at 46.2P. Given that 220 thousand tasks were sent out, we were at 45.1P when the challenge began.
6) Message boards : Number crunching : International Day of Education Challenge (Message 136625)
Posted 16 hours ago by Profile Michael GoetzProject donor
Just a little side question:

285 GPV67 Carl Sagan 8 538.39 14
285 JakubH Czech National Team 8 538.39 14
287 paleseptember Free-DC 8 538.39 14
287 dannyridel AMD Users 8 538.39 14

Why would users with the same number of challenge credit have different ranks?


Because, damn it, there's a bug in my program.
7) Message boards : Number crunching : International Day of Education Challenge (Message 136614)
Posted 22 hours ago by Profile Michael GoetzProject donor
1 hour down, 23 to go...


Challenge: International Education Day
App: 12 (321-Sieve)
(As of 2020-01-24 01:01:54 UTC)

42951 tasks have been sent out. [CPU/GPU/anonymous_platform: 42951 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

9 (0%) were aborted. [9 (0%) / 0 (0%) / 0 (0%)]
8 (0%) came back with some kind of an error. [8 (0%) / 0 (0%) / 0 (0%)]
2110 (5%) have returned a successful result. [2110 (5%) / 0 (0%) / 0 (0%)]
40825 (95%) are still in progress. [40832 (95%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

1814 (86%) are pending validation. [1814 (86%) / 0 (0%) / 0 (0%)]
296 (14%) have been successfully validated. [296 (14%) / 0 (0%) / 0 (0%)]
0 (0%) were invalid. [0 (0%) / 0 (0%) / 0 (0%)]
0 (0%) are inconclusive. [0 (0%) / 0 (0%) / 0 (0%)]
8) Message boards : Aggie The Pew message board (Message 136611)
Posted 22 hours ago by Profile Michael GoetzProject donor
Did anyone else have difficulties downloading tasks?
I had to wait about 10 minutes for most of them


Some people had some trouble, yes. I'm not 100% why, but it looks like we may have momentarily run out of database connections.
9) Message boards : Aggie The Pew message board (Message 136582)
Posted 1 day ago by Profile Michael GoetzProject donor
First time I'll be around for a TdP, so I'm hoping for at least a Prime badge, and a mega (aren't we all?) i don't have the hardware to compete for most of the jersies sadly.


Luck is a good substitute for hardware. :)
10) Message boards : Number crunching : International Day of Education Challenge (Message 136575)
Posted 1 day ago by Profile Michael GoetzProject donor
Please Note ;

I crunch with 12 CPU's per Task : Time per Task is also 3 mins - 6 sec.


Actually you are not.

You're running PPS-Sieve tasks, on the GPU, in a few minutes. Your 321-sieve tasks are taking much longer.

Neither sieve supports multi-threading. The multi-threading controls on the preferences web page only work for LLR tasks. They are ignored by everything else, including the sieves.


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