As a heads-up to everyone, we've decided to stop PPR12M manual sieving at p=20,000T (as of this moment we're reserved through p=14,302T). At the rate we've sieved over the last year, that's about eight months worth of work. Factor density is getting low enough that it's becoming difficult to be certain that any given range was sieved properly. Given that we're at least ten years from using PPR12M sieving to generate LLR work, we're better off with users running PPS (9M) sieving on BOINC. When that reaches optimum, PPR12M moves to BOINC and we will not be starting any new PPR manual sieving. This way all subsequent sieving is doublechecked and we don't need to worry about whether we're missing candidates.

When that reaches optimum, PPR12M moves to BOINC and we will not be starting any new PPR manual sieving. This way all subsequent sieving is doublechecked and we don't need to worry about whether we're missing candidates.

When that reaches optimum

When that reaches optimum, PPR12M moves to BOINC and we will not be starting any new PPR manual sieving. This way all subsequent sieving is doublechecked and we don't need to worry about whether we're missing candidates.

I assume it'll be another badge, no?

Another badge? No. The same PPS Sv badge was used for PPS 3M, 6M and now 9M. It's exactly the same everything except one uses -n6M -N9M in the command line and the other uses -n9M -N12M. As was said elsewhere, the current PPS sieving under BOINC will not hit optimal until something like p=900P and will be evaluated when we get closer to that level. Currently PPS 9M sieving on BOINC is at p=186.3P so we're a long way off. I would expect that PPR12M sieving will hit optimal at something like p=1600P but again that's very far off and much could change by then.

[quote]When that reaches optimum, PPR12M moves to BOINC and we will not be starting any new PPR manual sieving. This way all subsequent sieving is doublechecked and we don't need to worry about whether we're missing candidates.

I assume it'll be another badge, no?

No. Manual sieving credit is applied to the PSA badge, and BOINC PPS sieving credit is applied to the PPS-Sieve badge. Nothing changes with regards to badges.

Though I refer to PPR12M sieving and on BOINC it's called PPS sieving, it's the same thing. PPR is more technically correct as in Prime Proth Riesel sieving. In both cases we're sieving both Proth (c=1) and Riesel (c=-1) candidates. It doesn't add much overhead to include the Riesel candidates. BOINC is also sieving both Proth and Riesel, but the badge is called PPS to match the LLR PPS, PPSE and PPS Mega projects. You can see the Riesel sieves we make available at http://www.primegrid.com/sieving/rsp but please don't go downloading them just for the heck of it - we pay for every byte of outgoing data.

Though I refer to PPR12M sieving and on BOINC it's called PPS sieving, it's the same thing. PPR is more technically correct as in Prime Proth Riesel sieving. In both cases we're sieving both Proth (c=1) and Riesel (c=-1) candidates. It doesn't add much overhead to include the Riesel candidates. BOINC is also sieving both Proth and Riesel, but the badge is called PPS to match the LLR PPS, PPSE and PPS Mega projects. You can see the Riesel sieves we make available at http://www.primegrid.com/sieving/rsp but please don't go downloading them just for the heck of it - we pay for every byte of outgoing data.

Jim, how much is reasonable for you to wait for a particular range to be returned?

The reason I ask is that some of us may reserve a little more than usual as we approach 20P and which, by extension, will mean a greater turnaround time than what is otherwise normal.

Anyway, your reply is very helpful.

There are still a bunch of late PPR12M reservations. The following are now in effect:

1) Maximum reservation size for PPR12M is now 10T. 20T is obviously unrealistic for many of you.

2) Maximum number of simultaneous open reservations is reduced to 5.

3) If you have an open reservation older than 14 days, you can't make new reservations.

Every action on manual sieving is logged - that's every reservation, cancellation, upload plus any admin actions taken by me. So please don't try to game the system, I'll know.

EDIT: After six hours of sleep I'm feeling more charitable. Anyone who usually gets their work in within two weeks can have the 5 simultaneous reservation limit pushed higher on an individual basis (two people have it already). Be prepared to explain why that should happen. Hoarding ranges or making the next badge level before PPR12M runs out of work don't count as reasons to me. Please contact me by PM, not in the forums.