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Message boards : Seventeen or Bust : Update on seventeenorbust.com

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Michael GoetzProject donor
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Joined: 21 Jan 10
Posts: 9703
ID: 53948
Credit: 107,847,635
RAC: 49,503
321 LLR Amethyst: Earned 1,000,000 credits (1,169,719)Cullen LLR Amethyst: Earned 1,000,000 credits (1,157,331)ESP LLR Amethyst: Earned 1,000,000 credits (1,179,211)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,330,821)PPS LLR Amethyst: Earned 1,000,000 credits (1,254,873)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Ruby: Earned 2,000,000 credits (2,632,795)SR5 LLR Turquoise: Earned 5,000,000 credits (6,048,315)SGS LLR Amethyst: Earned 1,000,000 credits (1,680,461)TRP LLR Amethyst: Earned 1,000,000 credits (1,324,283)Woodall LLR Amethyst: Earned 1,000,000 credits (1,145,077)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,085,723)PPS Sieve Jade: Earned 10,000,000 credits (18,175,834)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (5,881,239)GFN Sapphire: Earned 20,000,000 credits (42,663,419)PSA Jade: Earned 10,000,000 credits (10,028,791)
Message 94472 - Posted: 23 Apr 2016 | 17:28:03 UTC

If you're wondering what has happened to seventeenorbust.com and have found this forum, here's what I know right now:

Louie has had some difficulty with the server, domain name, and/or hosting platform and is in the process of transferring the server. It's unclear right now how long it will take, but he's working on it.

Seventeenorbust.com's own forums can be found here: http://www.free-dc.org/forum/forumdisplay.php?38-Seventeen-or-Bust-*Official*-Project-Forum
____________

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Michael GoetzProject donor
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Joined: 21 Jan 10
Posts: 9703
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Credit: 107,847,635
RAC: 49,503
321 LLR Amethyst: Earned 1,000,000 credits (1,169,719)Cullen LLR Amethyst: Earned 1,000,000 credits (1,157,331)ESP LLR Amethyst: Earned 1,000,000 credits (1,179,211)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,330,821)PPS LLR Amethyst: Earned 1,000,000 credits (1,254,873)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Ruby: Earned 2,000,000 credits (2,632,795)SR5 LLR Turquoise: Earned 5,000,000 credits (6,048,315)SGS LLR Amethyst: Earned 1,000,000 credits (1,680,461)TRP LLR Amethyst: Earned 1,000,000 credits (1,324,283)Woodall LLR Amethyst: Earned 1,000,000 credits (1,145,077)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,085,723)PPS Sieve Jade: Earned 10,000,000 credits (18,175,834)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (5,881,239)GFN Sapphire: Earned 20,000,000 credits (42,663,419)PSA Jade: Earned 10,000,000 credits (10,028,791)
Message 94898 - Posted: 9 May 2016 | 3:15:33 UTC

Update:

The latest word from Louie is not good. The server and the backups appear to be lost. It's unclear whether the SoB project will be coming back.

As of right now, we intend to keep on working on our 2 k's. Beyond that it's too early to say.
____________

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Keith
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321 LLR Ruby: Earned 2,000,000 credits (2,004,562)Cullen LLR Amethyst: Earned 1,000,000 credits (1,038,545)ESP LLR Amethyst: Earned 1,000,000 credits (1,380,079)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,003,159)PPS LLR Ruby: Earned 2,000,000 credits (2,000,903)PSP LLR Ruby: Earned 2,000,000 credits (2,436,657)SoB LLR Ruby: Earned 2,000,000 credits (2,041,485)SR5 LLR Ruby: Earned 2,000,000 credits (2,001,608)SGS LLR Amethyst: Earned 1,000,000 credits (1,999,947)TRP LLR Ruby: Earned 2,000,000 credits (2,003,182)Woodall LLR Amethyst: Earned 1,000,000 credits (1,045,896)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,336,376)PPS Sieve Emerald: Earned 50,000,000 credits (52,537,035)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,002,980)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,010,755)AP 26/27 Sapphire: Earned 20,000,000 credits (20,000,721)GFN Sapphire: Earned 20,000,000 credits (34,074,204)
Message 94902 - Posted: 9 May 2016 | 11:27:29 UTC

This is not good.
I really hope there is some way for this project to proceed onward. I'd really like to see it proven.
SoB was the distributed computing project I ran after giving up on SETI@Home.
____________
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321 LLR Ruby: Earned 2,000,000 credits (2,014,631)Cullen LLR Ruby: Earned 2,000,000 credits (2,041,185)ESP LLR Ruby: Earned 2,000,000 credits (2,067,139)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,011,657)PPS LLR Ruby: Earned 2,000,000 credits (2,068,090)PSP LLR Ruby: Earned 2,000,000 credits (3,617,961)SoB LLR Turquoise: Earned 5,000,000 credits (9,276,470)SR5 LLR Turquoise: Earned 5,000,000 credits (6,401,985)SGS LLR Ruby: Earned 2,000,000 credits (2,000,495)TRP LLR Ruby: Earned 2,000,000 credits (2,072,292)Woodall LLR Ruby: Earned 2,000,000 credits (2,082,879)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,002,919)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (6,177,784)PPS Sieve Sapphire: Earned 20,000,000 credits (27,326,793)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,341,676)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,804)AP 26/27 Ruby: Earned 2,000,000 credits (3,416,335)GFN Sapphire: Earned 20,000,000 credits (26,019,470)PSA Double Silver: Earned 200,000,000 credits (359,965,272)
Message 94912 - Posted: 9 May 2016 | 16:12:35 UTC

Would anyone here have a recent copy of http://seventeenorbust.com/sieve/results.txt.bz2 (not posting as a link because that site is gone). Louie Helm from seventeenorbust.com is looking for one.

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321 LLR Turquoise: Earned 5,000,000 credits (7,428,581)Cullen LLR Turquoise: Earned 5,000,000 credits (6,655,866)ESP LLR Turquoise: Earned 5,000,000 credits (8,014,404)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,413,613)PPS LLR Turquoise: Earned 5,000,000 credits (9,014,865)PSP LLR Jade: Earned 10,000,000 credits (10,891,779)SoB LLR Jade: Earned 10,000,000 credits (10,261,655)SR5 LLR Turquoise: Earned 5,000,000 credits (7,096,480)SGS LLR Turquoise: Earned 5,000,000 credits (7,403,813)TRP LLR Turquoise: Earned 5,000,000 credits (7,714,186)Woodall LLR Turquoise: Earned 5,000,000 credits (5,726,778)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,094,130)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (10,139,500)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,011,554,600)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,235,150)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,376,844)AP 26/27 Jade: Earned 10,000,000 credits (10,616,918)GFN Double Silver: Earned 200,000,000 credits (414,102,503)PSA Double Bronze: Earned 100,000,000 credits (103,206,213)
Message 94918 - Posted: 9 May 2016 | 18:12:28 UTC - in response to Message 94898.

Update:

The latest word from Louie is not good. The server and the backups appear to be lost. It's unclear whether the SoB project will be coming back.

As of right now, we intend to keep on working on our 2 k's. Beyond that it's too early to say.

Any time frame on how much work WE have left?

Would anyone here have a recent copy of http://seventeenorbust.com/sieve/results.txt.bz2 (not posting as a link because that site is gone). Louie Helm from seventeenorbust.com is looking for one.

And if no one has that sieve file can we rerun that sieve range to help out SoB so we both can continue crunching this conjecture. It would be a crime to stop now even if we have redo parts of it and just waste all the crunching done so far, even though it still may take a looonng time to solve this conjecture. Or we may never solve it in a 100 years or more. We won't know unless we try a lot more (or a little more if we're Reeeaally lucky).

I know this is probably the hardest conjecture Primegrid is doing but I would like to see at least one of the conjectures we crunch to be solved in the next few years even though SoB has the lowest chance of THAT happening especially givin' current circumstances.



____________
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."

-Benjamin Franklin

Michael GoetzProject donor
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Credit: 107,847,635
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321 LLR Amethyst: Earned 1,000,000 credits (1,169,719)Cullen LLR Amethyst: Earned 1,000,000 credits (1,157,331)ESP LLR Amethyst: Earned 1,000,000 credits (1,179,211)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,330,821)PPS LLR Amethyst: Earned 1,000,000 credits (1,254,873)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Ruby: Earned 2,000,000 credits (2,632,795)SR5 LLR Turquoise: Earned 5,000,000 credits (6,048,315)SGS LLR Amethyst: Earned 1,000,000 credits (1,680,461)TRP LLR Amethyst: Earned 1,000,000 credits (1,324,283)Woodall LLR Amethyst: Earned 1,000,000 credits (1,145,077)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,085,723)PPS Sieve Jade: Earned 10,000,000 credits (18,175,834)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (5,881,239)GFN Sapphire: Earned 20,000,000 credits (42,663,419)PSA Jade: Earned 10,000,000 credits (10,028,791)
Message 94919 - Posted: 9 May 2016 | 18:28:07 UTC - in response to Message 94918.
Last modified: 9 May 2016 | 18:29:10 UTC

Any time frame on how much work WE have left?


Essentially infinite. There's no problem with generating new work. The problem is getting records of what work has been done on SoB.

The existing sieve files go to n=50M, and our current leading edge is at n=31M. That's many, many years worth of work remaining.

From my perspective, we're facing the prospect of redoing all work on 4 of the 6 remaining k's. I don't see us abandoning the project. We were already planning for a substantial double checking campaign for our 2 k's, but if we end up taking over the other 4 k's too, the double check on those four will essentially be a complete redo if no data on the earlier work exists.
____________

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Michael GoetzProject donor
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321 LLR Amethyst: Earned 1,000,000 credits (1,169,719)Cullen LLR Amethyst: Earned 1,000,000 credits (1,157,331)ESP LLR Amethyst: Earned 1,000,000 credits (1,179,211)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,330,821)PPS LLR Amethyst: Earned 1,000,000 credits (1,254,873)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Ruby: Earned 2,000,000 credits (2,632,795)SR5 LLR Turquoise: Earned 5,000,000 credits (6,048,315)SGS LLR Amethyst: Earned 1,000,000 credits (1,680,461)TRP LLR Amethyst: Earned 1,000,000 credits (1,324,283)Woodall LLR Amethyst: Earned 1,000,000 credits (1,145,077)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,085,723)PPS Sieve Jade: Earned 10,000,000 credits (18,175,834)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (5,881,239)GFN Sapphire: Earned 20,000,000 credits (42,663,419)PSA Jade: Earned 10,000,000 credits (10,028,791)
Message 94920 - Posted: 9 May 2016 | 18:37:08 UTC

Not that it's an issue, but if we had to recreate the sieve file from scratch for some reason, it would probably take about a year to do that based upon how quickly the recent ESP sieving was done. I'm pretty sure I have more than a year's worth of SoB work already leaded into the server. So in that worse-than-worst-case scenario, we still wouldn't run out of work.
____________

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Joe O
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Message 94930 - Posted: 10 May 2016 | 1:38:22 UTC

I have the sob sieve file I sent to Louie just before he went on walkabout.
I can email it to you if you want it.

Michael GoetzProject donor
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Joined: 21 Jan 10
Posts: 9703
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Credit: 107,847,635
RAC: 49,503
321 LLR Amethyst: Earned 1,000,000 credits (1,169,719)Cullen LLR Amethyst: Earned 1,000,000 credits (1,157,331)ESP LLR Amethyst: Earned 1,000,000 credits (1,179,211)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,330,821)PPS LLR Amethyst: Earned 1,000,000 credits (1,254,873)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Ruby: Earned 2,000,000 credits (2,632,795)SR5 LLR Turquoise: Earned 5,000,000 credits (6,048,315)SGS LLR Amethyst: Earned 1,000,000 credits (1,680,461)TRP LLR Amethyst: Earned 1,000,000 credits (1,324,283)Woodall LLR Amethyst: Earned 1,000,000 credits (1,145,077)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,085,723)PPS Sieve Jade: Earned 10,000,000 credits (18,175,834)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (5,881,239)GFN Sapphire: Earned 20,000,000 credits (42,663,419)PSA Jade: Earned 10,000,000 credits (10,028,791)
Message 94931 - Posted: 10 May 2016 | 1:56:48 UTC - in response to Message 94930.

I have the sob sieve file I sent to Louie just before he went on walkabout.
I can email it to you if you want it.


That might be helpful, thanks. You may also want to ask Louie if he could use another copy.
____________

Please do not PM me with support questions. They will usually go unanswered. Ask on the forums instead. Thank you!

Joe O
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PSA Jade: Earned 10,000,000 credits (19,692,669)
Message 94933 - Posted: 10 May 2016 | 4:22:10 UTC - in response to Message 94931.

The only email I have for Louis is at seventeenorbust.com which I think is no longer valid. I have mailed it to John.

Kelly DaviesProject donor
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321 LLR Ruby: Earned 2,000,000 credits (2,050,518)Cullen LLR Ruby: Earned 2,000,000 credits (2,282,176)ESP LLR Ruby: Earned 2,000,000 credits (3,106,610)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,142,891)PPS LLR Ruby: Earned 2,000,000 credits (2,099,213)PSP LLR Ruby: Earned 2,000,000 credits (3,475,366)SoB LLR Double Bronze: Earned 100,000,000 credits (108,866,266)SR5 LLR Ruby: Earned 2,000,000 credits (3,027,344)SGS LLR Ruby: Earned 2,000,000 credits (3,259,781)TRP LLR Ruby: Earned 2,000,000 credits (2,010,534)Woodall LLR Ruby: Earned 2,000,000 credits (2,077,196)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (3,139,793)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (4,128,706,412)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Sapphire: Earned 20,000,000 credits (24,236,704)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,007,588)AP 26/27 Turquoise: Earned 5,000,000 credits (6,117,059)GFN Jade: Earned 10,000,000 credits (15,782,029)PSA Silver: Earned 100,000 credits (366,040)
Message 94982 - Posted: 11 May 2016 | 14:45:45 UTC
Last modified: 11 May 2016 | 14:46:10 UTC

Man, i started crunching there 11 or 12 years ago. And its my pet project here. :(
____________
My Lucky Number is 1893*2^1283297+1

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Tour de Primes 2017Tour de Primes 2017321 LLR Sapphire: Earned 20,000,000 credits (31,446,085)Cullen LLR Sapphire: Earned 20,000,000 credits (28,149,461)ESP LLR Sapphire: Earned 20,000,000 credits (41,046,857)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (50,392,031)PPS LLR Emerald: Earned 50,000,000 credits (81,216,034)PSP LLR Emerald: Earned 50,000,000 credits (51,579,597)SoB LLR Double Bronze: Earned 100,000,000 credits (104,315,820)SR5 LLR Emerald: Earned 50,000,000 credits (50,589,263)SGS LLR Emerald: Earned 50,000,000 credits (54,941,721)TRP LLR Emerald: Earned 50,000,000 credits (54,280,542)Woodall LLR Sapphire: Earned 20,000,000 credits (32,901,915)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,031,883)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,879,764)Generalized Cullen/Woodall Sieve Emerald: Earned 50,000,000 credits (80,155,619)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,293,915,556)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Double Bronze: Earned 100,000,000 credits (101,857,516)TRP Sieve (suspended) Emerald: Earned 50,000,000 credits (50,936,081)AP 26/27 Double Bronze: Earned 100,000,000 credits (142,370,202)GFN Double Ruby: Earned 2,000,000,000 credits (2,066,696,259)PSA Double Ruby: Earned 2,000,000,000 credits (2,593,686,710)
Message 95671 - Posted: 9 Jun 2016 | 23:55:06 UTC

Under "Subproject Status", the "Range Statistics" for SoB look different. has primegrid taken over for seventeenorbust.com?
____________

Michael GoetzProject donor
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Credit: 107,847,635
RAC: 49,503
321 LLR Amethyst: Earned 1,000,000 credits (1,169,719)Cullen LLR Amethyst: Earned 1,000,000 credits (1,157,331)ESP LLR Amethyst: Earned 1,000,000 credits (1,179,211)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,330,821)PPS LLR Amethyst: Earned 1,000,000 credits (1,254,873)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Ruby: Earned 2,000,000 credits (2,632,795)SR5 LLR Turquoise: Earned 5,000,000 credits (6,048,315)SGS LLR Amethyst: Earned 1,000,000 credits (1,680,461)TRP LLR Amethyst: Earned 1,000,000 credits (1,324,283)Woodall LLR Amethyst: Earned 1,000,000 credits (1,145,077)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,085,723)PPS Sieve Jade: Earned 10,000,000 credits (18,175,834)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (5,881,239)GFN Sapphire: Earned 20,000,000 credits (42,663,419)PSA Jade: Earned 10,000,000 credits (10,028,791)
Message 95674 - Posted: 10 Jun 2016 | 1:35:38 UTC - in response to Message 95671.

Under "Subproject Status", the "Range Statistics" for SoB look different. has primegrid taken over for seventeenorbust.com?


You probably noticed that we switched from crunching our 2 k's to crunching all 6 k's, but no, we haven't taken over for SoB. We're still crunching our "allocated" ranges from SoB, the last of which is n=31M (for all 6 k's).

It's a little complicated because SoB had already stopped crunching our two k's in the middle of the n=29M range, so we've been crunching those two k's exclusively up until we reached n=31M. However, SoB requested that we crunch all 6 k's for n=31M before continuing on with just our two k's. So when the server got to n=31M, it started to send out all 6 k's again. It will continue to do this until n reaches 32M, at which point we switch back to just our 2 k's.

With the eventual status of SoB unknown, it's entirely possible the plan may change. But for now we haven't changed anything.

Also keep in mind that at some point we'd like to double check candidates that haven't already been double checked. We don't have a solid plan for that, and there's a whole bunch of complications that make it somewhat more difficult than the other double checks we've done.
____________

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Message 95742 - Posted: 12 Jun 2016 | 21:16:33 UTC

We should see a prime soon.
"On the number of primes in a sequence" by Yves Gallot

Roger quoted this in a few of his threads. I would post my graph but can not figure out a way to do it

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Message 95758 - Posted: 13 Jun 2016 | 9:25:45 UTC - in response to Message 95742.

We should see a prime soon.
"On the number of primes in a sequence" by Yves Gallot

Roger quoted this in a few of his threads. I would post my graph but can not figure out a way to do it


I do not think it works quite like this. It could be true if we had asked ourselves years ago (with the knowledge we had then) that the best guess was we would find a prime about now.

But with the knowledge we have now we expect to wait even longer before we make a find.

The longer one searches without finding anything, the more the expectation of the time until next find grows.

I kind of think like this as a "memoryless" stochastic process.

/JeppeSN

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Message 95764 - Posted: 13 Jun 2016 | 12:19:55 UTC
Last modified: 13 Jun 2016 | 12:22:09 UTC

Unfortunately JeppeSN is right.

Thinking of it as "we're overdue to find a prime" is like flipping a coin 10 times and it coming up heads 10 times and then expecting the next flip to have better than 50/50 odds of being tails. It doesn't work that way. Primes found or not found in the past have no effect on the odds of finding primes in subsequent searches.

Furthermore, since both the difficulty goes up significantly and the chances of finding primes go down significantly as the size of the candidate goes up, as the search continues the correct expectation is that it will now take even longer until we find the next prime. In fact, the expected time to find the next prime goes up rather dramatically as the candidates increase in size. Chris Caldwell, on his Top 5000 primes site, uses a "prime score" formula that approximates how hard it is to find a prime. It takes into account not only the rarity of the prime, but also the difficulty of testing the prime. The "prime score" formula here at PrimeGrid is similar. The difficult of finding a prime with X digits, and therefore the expected amount of time until we find a prime, is proportional to X^3 * ln(X).

As an example, the SoB project is currently searching numbers with about 9.3 million digits and PSP is searching numbers with about 5.6 million digits. I therefore expect it will take about 5 times longer to find the next SoB prime than the next PSP prime.

There's some other factors involved such as the number of k's and the "weight" of each k, but they won't affect the big picture by much. Also, that approximation assumes that you are putting equal computing power on both PSP and SoB. In general, people tend to prefer smaller tasks, so it's likely there's more cores crunching PSP than SoB.

Rather than being "due", the further the SoB project goes, the worse our chances of quickly finding a prime become.
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Message 95893 - Posted: 19 Jun 2016 | 19:09:51 UTC - in response to Message 94920.

Not that it's an issue, but if we had to recreate the sieve file from scratch for some reason, it would probably take about a year to do that based upon how quickly the recent ESP sieving was done. I'm pretty sure I have more than a year's worth of SoB work already leaded into the server. So in that worse-than-worst-case scenario, we still wouldn't run out of work.

I keep meaning to reply to this. I have all the factors from just over 1M to 1G for the current 6 candidates. I also have all the factors ever submitted in the sieve effort from 1G on up to when we stopped. And the NewPgen files for the current 6 candidates.

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Message 95894 - Posted: 19 Jun 2016 | 20:42:47 UTC - in response to Message 95893.

Not that it's an issue, but if we had to recreate the sieve file from scratch for some reason, it would probably take about a year to do that based upon how quickly the recent ESP sieving was done. I'm pretty sure I have more than a year's worth of SoB work already leaded into the server. So in that worse-than-worst-case scenario, we still wouldn't run out of work.

I keep meaning to reply to this. I have all the factors from just over 1M to 1G for the current 6 candidates. I also have all the factors ever submitted in the sieve effort from 1G on up to when we stopped. And the NewPgen files for the current 6 candidates.


That's great news. Can you send them to Jim or myself so we can make sure we are up to date?
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Message 97165 - Posted: 26 Jul 2016 | 14:01:31 UTC

I did say I'd let you know as soon as I heard anything, so here it is. It's not good news, unfortunately.

There's no hope of recovering the data or software from the SoB server. It's gone. The SeventeenOrBust.com server is not coming back.

Louie has asked us to take over the entire SoB search. We intend to do so, but I can't tell you exactly what that means. For now, we are crunching all 6 Ks in the 31M < n < 32M range, and we'll continue with that until we decide how to move forward.

Everyone from SoB is, of course, welcome to come on over to PrimeGrid and continue the search here.

I'd like, at this point, to sincerely thank everyone who sent us their log files. Of all the information we've been able to gather from different sources, I suspect that your log files may end up being the most useful. They contain the most recent information, regarding the largest tasks. Those are most useful.
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Message 97235 - Posted: 27 Jul 2016 | 3:18:18 UTC - in response to Message 97165.

I have a lot of the old SoB project prime.log files - where should I send them?

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Message 97237 - Posted: 27 Jul 2016 | 3:29:35 UTC - in response to Message 97235.

I have a lot of the old SoB project prime.log files - where should I send them?


You can send them to me at mgoetz [at] primegrid [dot] com.

Thanks!

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Message 97239 - Posted: 27 Jul 2016 | 3:53:07 UTC - in response to Message 97237.

I have a lot of the old SoB project prime.log files - where should I send them?


You can send them to me at mgoetz [at] primegrid [dot] com.

Thanks!


I will do that when I can get around to it. One thing, I'm subscribed to this thread and another one, I have my correct email address, but I am not getting notices of new messages in the forum. Shouldn't I be getting notices?

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Message 97241 - Posted: 27 Jul 2016 | 4:46:05 UTC - in response to Message 97239.

I have a lot of the old SoB project prime.log files - where should I send them?


You can send them to me at mgoetz [at] primegrid [dot] com.

Thanks!


I will do that when I can get around to it. One thing, I'm subscribed to this thread and another one, I have my correct email address, but I am not getting notices of new messages in the forum. Shouldn't I be getting notices?


Ok, you need to enable email notifications in the community preferences:

* On the menu on the left side of this page, click on "Your Account" to go to your account page.

* Under "Preferences", click on "Community preferences"

* At the top, under "Notifications", select either "Immediately, by email", or "In a single daily email".

* Scroll to the bottom of the page and click on "Update".


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Message 99945 - Posted: 18 Oct 2016 | 10:29:22 UTC - in response to Message 97241.

Hi Michael,

any information or progress update about the reset/take over of SoB since July?

Thanks
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Message 99954 - Posted: 18 Oct 2016 | 15:11:01 UTC - in response to Message 99945.

Hi Michael,

any information or progress update about the reset/take over of SoB since July?

Thanks


Thanks for asking, and my apologies for not saying anything sooner. I thought I had, but I don't see anything, at least not here.

Sadly, Seventeen or Bust, the original project, is dead, and is not coming back. PrimeGrid will take over the entire search.

No decisions have been made yet regarding what that actually means in terms how we're going to search the 6 remaining Ks, what's going to be double checked, or what we're going to do about all the missing results. I'll be honest -- it's a pretty ugly situation and fixing it may take years of crunching to replace what was lost.

For now, we're continuing to process the n=31 range. There's a ways to go on that. I expect to have a plan before we're done with that range.
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Message 99960 - Posted: 18 Oct 2016 | 16:22:12 UTC

It looks like I posted on the SoB forums, but not here. Sorry about that. Here's a copy of that message:

I did say I'd let you know as soon as I heard anything, so here it is. It's not good news, unfortunately.

There's no hope of recovering the data or software from the SoB server. It's gone. SoB is not coming back.

Louie has asked us to take over the entire SoB search. We intend to do so, but I can't tell you exactly what that means. For now, we are crunching all 6 Ks in the 31M < n < 32M range, and we'll continue with that until we decide how to move forward.

You are all, of course, welcome to come on over to PrimeGrid and help with SoB.

I'd like, at this point, to sincerely thank everyone who sent us their log files. Of all the information we've been able to gather from different sources, I suspect that your log files may end up being the most useful. They contain the most recent information, regarding the largest tasks. Those are most useful.

____________

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Message 99961 - Posted: 18 Oct 2016 | 16:47:05 UTC - in response to Message 99954.


No decisions have been made yet regarding what that actually means in terms how we're going to search the 6 remaining Ks, what's going to be double checked, or what we're going to do about all the missing results. I'll be honest -- it's a pretty ugly situation and fixing it may take years of crunching to replace what was lost.


I've said it before, but I don't see the point in redoing the SoB stuff that was lost. We know approximately the limit on the exponents that were checked - it makes the most sense to restart there.

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Message 99963 - Posted: 18 Oct 2016 | 17:52:51 UTC - in response to Message 99961.


No decisions have been made yet regarding what that actually means in terms how we're going to search the 6 remaining Ks, what's going to be double checked, or what we're going to do about all the missing results. I'll be honest -- it's a pretty ugly situation and fixing it may take years of crunching to replace what was lost.


I've said it before, but I don't see the point in redoing the SoB stuff that was lost. We know approximately the limit on the exponents that were checked - it makes the most sense to restart there.


While we do have some results, for others we have no idea what was checked, and what was double checked. Since the difficulty of finding a prime increases in proportion to the cube of the size of the prime, a missed prime can add a tremendous amount of time to the project. This can be much more expensive than double checking, or even re-doing entire searches.

(Actually, it's worse than cubed; it's size^3*log(size) ).

We have found that computers are not nearly as reliable as most people think they are, and that complete double checking is absolutely essential. If we can't prove that something was tested, and that the correct result was produced, it will eventually have to be tested again.
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Message 99971 - Posted: 18 Oct 2016 | 19:11:50 UTC - in response to Message 99961.


No decisions have been made yet regarding what that actually means in terms how we're going to search the 6 remaining Ks, what's going to be double checked, or what we're going to do about all the missing results. I'll be honest -- it's a pretty ugly situation and fixing it may take years of crunching to replace what was lost.


I've said it before, but I don't see the point in redoing the SoB stuff that was lost. We know approximately the limit on the exponents that were checked - it makes the most sense to restart there.

The problem is: original SoB work was only selectively double checked. It was something like "adaptive replication" on Boinc - they've manually checked some random results from a user and if no error was found, host was considered to be "reliable", and no more checks were done. Even with this simplified doublecheck approach they found two missed primes. Probably they eliminated really unstable systems, but even a mostly stable host may suddenly become unstable due to summer (higher room temperature) or dried thermal paste. Now we're spending more and more significant resources on huge tasks while there is a quite good chance that a prime was missed below. PG planned to do full doublecheck, but SoB lost all data. A good example how a project must NOT be done. I suspect I must end with some joke about word "bust" here, but by sense of English is not so good and really the whole story is very, very sad.

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Message 99982 - Posted: 18 Oct 2016 | 21:47:20 UTC

Reading the outcome of this has made me sad that so many of the results were lost. That said, I would definitely put some of my CPU cycles to use working on the double check effort.
____________

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Message 99986 - Posted: 19 Oct 2016 | 3:04:49 UTC - in response to Message 99963.
Last modified: 19 Oct 2016 | 3:10:30 UTC



While we do have some results, for others we have no idea what was checked, and what was double checked. Since the difficulty of finding a prime increases in proportion to the cube of the size of the prime, a missed prime can add a tremendous amount of time to the project. This can be much more expensive than double checking, or even re-doing entire searches.

(Actually, it's worse than cubed; it's size^3*log(size) ).

We have found that computers are not nearly as reliable as most people think they are, and that complete double checking is absolutely essential. If we can't prove that something was tested, and that the correct result was produced, it will eventually have to be tested again.


We know that all exponents up to something like 21,000,000 were checked once. We need to strike a balance between the possibility of an error on an exponent already checked versus doing that work on new numbers. If there is a 1% chance of an error, then 99% of the double-check computation will be fruitless and wasted.

How many numbers has PrimeGrid checked for primality, which tested as composite the first time but a double-check showed it to be prime?

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Message 99987 - Posted: 19 Oct 2016 | 5:06:18 UTC - in response to Message 99986.
Last modified: 19 Oct 2016 | 5:16:44 UTC

How many numbers has PrimeGrid checked for primality, which tested as composite the first time but a double-check showed it to be prime?


I've got a better question: "How many of our SoB tests are erroneous?" By that I mean how many had a calculation error and returned the wrong result? If that happens while testing a number that is actually prime, and the result is not double checked, the prime WILL be missed.

The answer to that question is only available if, in fact, you're doing double checking. Otherwise, you're merely guessing that most results are good and hoping that very few are actually wrong. But you really don't know.

Furthermore, if you're not double checking results, you don't know which computers are bad, so no effort will be made to fix them. Since we DO double check, a lot of computers that are having problems do get fixed. So our error rate is lower than it would be had we not been double checking everything.

So, what's the answer to my version of your question? The answer is 6%. Without double checking, there would be a 6% chance that any prime would be missed. Of course, without double checking, more computers would be producing bad results because their owners wouldn't know there's a problem, so I'd expect somewhat more than 6% of the results to be wrong.

The error rate at the SoB project was almost certainly higher, but even if the data hadn't been lost there would be no way to know how many tests had calculation errors.
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Message 99989 - Posted: 19 Oct 2016 | 5:40:24 UTC - in response to Message 99987.

So, what's the answer to my version of your question? The answer is 6%. Without double checking, there would be a 6% chance that any prime would be missed. Of course, without double checking, more computers would be producing bad results because their owners wouldn't know there's a problem, so I'd expect somewhat more than 6% of the results to be wrong.


So 6% of the tests first gave a result of composite, but then a double check proved it prime? I don't think that is what you mean. Generally, you do the computations, and if the residue is 1 it is prime and if it isn't 1 then it is composite. If an error occurs, and the residue it calculates is not 1, and a double check gives the correct result, that number is still almost certainly composite. For a double check to find a mistake and the number was actually prime would be like hitting the national lottery.

And also, in the SoB project, we are not trying to find every prime - we are only trying to find one prime for each constant.

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Message 99992 - Posted: 19 Oct 2016 | 7:41:02 UTC - in response to Message 99989.

Each test produces a residue which can be compared against a 2nd computer. If the values match, you can be fairly certain it is a good result. There are cases where both could produce the same incorrect result, but this is unlikely.

The fear is, if a faulty system says a number is composite when it is really prime, you could be doing a lot more work with a lot more computers for a long time. There is a tradeoff between being sure there isn't a smaller prime, against doing separate first and double check passes.

If anyone remembers the rieselsieve project before it suddenly disappeared, in that I actually found a decent size prime for the time in double check. That was at n around 1.5M, whereas first pass testing was around 2M two years before that (when I got another one). For that k, a lot of tests would not need to have been done had the prime been detected earlier.

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Message 99995 - Posted: 19 Oct 2016 | 11:51:26 UTC - in response to Message 99992.
Last modified: 19 Oct 2016 | 11:52:32 UTC

Look at the bright side of life :

Worst scenario: We need to 'restart' from scratch all remaining 6 k until we reach the current already double checked lower bound on PrimeGrid.

1: That means small WUs at start. We could catch some people that run away SoB project due to very very long tasks on old computers.

2: This will give a chance for these people to get some SoB badges.

3: What about a separate project like ESP and PSP (I know,not really the same case) that will run only the single/double check SoB task to the current PrimeGrid bounds? Double Seventeen or Bust: DSB
This will let crunchers the choice to continue SoB or start the new one for multiple reasons
- Keep most powerful computers on SoB and add old ones to the new project
- Really think a prime has been missed in the range to double check.
- Add yours....
____________
Badge Score: 2*2 + 13*5 + 2*6 + 2*8 + 1*9 = 106

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Message 99997 - Posted: 19 Oct 2016 | 16:07:09 UTC - in response to Message 99995.


3: What about a separate project like ESP and PSP (I know,not really the same case) that will run only the single/double check SoB task to the current PrimeGrid bounds? Double

I like the idea of doubling down on SoB. It could be a separate project that contributes to the same badge, similar to how PPS/PPS Mega/PPSE are broken out.
____________

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Message 100000 - Posted: 19 Oct 2016 | 16:41:19 UTC - in response to Message 99997.


3: What about a separate project like ESP and PSP (I know,not really the same case) that will run only the single/double check SoB task to the current PrimeGrid bounds? Double

I like the idea of doubling down on SoB. It could be a separate project that contributes to the same badge, similar to how PPS/PPS Mega/PPSE are broken out.


Before I comment on this, I want to reiterate that no decisions have been made. This is the kind of question that's been discussed internally.

One reason NOT to do what you suggest is that if a double check does indeed discover a missed prime, all the ongoing work on the main leading edge SOB tasks in that K would be for wasted. That's a strong incentive to suspend leading edge work on SoB while the double check is running. In the long view, "X" amount of computer power is needed to prove this conjecture, and it doesn't matter in which order you do the work. However, doing unnecessary work (e.g., searching candidates at a high n when there's a prime at a lower n) increases the total amount of work that must be done.


____________

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Message 100001 - Posted: 19 Oct 2016 | 16:42:35 UTC - in response to Message 99992.

Each test produces a residue which can be compared against a 2nd computer. If the values match, you can be fairly certain it is a good result. There are cases where both could produce the same incorrect result, but this is unlikely.

The fear is, if a faulty system says a number is composite when it is really prime, you could be doing a lot more work with a lot more computers for a long time. There is a tradeoff between being sure there isn't a smaller prime, against doing separate first and double check passes.


What about a limited number of checks (10-20) on each computer, to detect the faulty ones?

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Message 100005 - Posted: 19 Oct 2016 | 16:55:15 UTC - in response to Message 100001.

What about a limited number of checks (10-20) on each computer, to detect the faulty ones?


It might detect the obviously faulty ones, but what was once good can go bad. I've also had cases where a computer wasn't 100% stable, and best I got it was to one detected error a month or so before replacing hardware fixed it for good.

BOINC has something called adaptive replication which kinda covers this. A new device will be checked until it is believed good. Even then, it will occasionally send out units to be double checked to make sure it remains good, but you could still produce unchecked bad results. It may have uses where it doesn't matter if some results are bad.

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Message 100019 - Posted: 19 Oct 2016 | 22:17:46 UTC - in response to Message 100000.


3: What about a separate project like ESP and PSP (I know,not really the same case) that will run only the single/double check SoB task to the current PrimeGrid bounds? Double

I like the idea of doubling down on SoB. It could be a separate project that contributes to the same badge, similar to how PPS/PPS Mega/PPSE are broken out.


Before I comment on this, I want to reiterate that no decisions have been made. This is the kind of question that's been discussed internally.

One reason NOT to do what you suggest is that if a double check does indeed discover a missed prime, all the ongoing work on the main leading edge SOB tasks in that K would be for wasted. That's a strong incentive to suspend leading edge work on SoB while the double check is running. In the long view, "X" amount of computer power is needed to prove this conjecture, and it doesn't matter in which order you do the work. However, doing unnecessary work (e.g., searching candidates at a high n when there's a prime at a lower n) increases the total amount of work that must be done.


Ahh yes, that is a very valid point.
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Message 100023 - Posted: 20 Oct 2016 | 12:30:16 UTC - in response to Message 100019.


3: What about a separate project like ESP and PSP (I know,not really the same case) that will run only the single/double check SoB task to the current PrimeGrid bounds? Double

I like the idea of doubling down on SoB. It could be a separate project that contributes to the same badge, similar to how PPS/PPS Mega/PPSE are broken out.


Before I comment on this, I want to reiterate that no decisions have been made. This is the kind of question that's been discussed internally.

One reason NOT to do what you suggest is that if a double check does indeed discover a missed prime, all the ongoing work on the main leading edge SOB tasks in that K would be for wasted. That's a strong incentive to suspend leading edge work on SoB while the double check is running. In the long view, "X" amount of computer power is needed to prove this conjecture, and it doesn't matter in which order you do the work. However, doing unnecessary work (e.g., searching candidates at a high n when there's a prime at a lower n) increases the total amount of work that must be done.


Ahh yes, that is a very valid point.


Indeed.
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Message 100270 - Posted: 25 Oct 2016 | 2:43:17 UTC

I don't have the same factor file as anyone on my 8 valid SOB's. Is this pretty common? Is there any difference between AVX FFT and FM3 FFT? Could AES, AVX, FM3's produce different factors by design? I don't have ECC ram and remember someone saying something about the likely hood of my computer having a memory error was a 50% chance in a 60 day period of time.

Am I the bad computer? How often do computers find the same factor?

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Message 100557 - Posted: 4 Nov 2016 | 9:09:25 UTC - in response to Message 97165.

It is interesting, are you completely trust to those log files which had been sent you.
Because those logs can be corrupted or modified intentionally (or not).

Maybe there exist some kind of validation of them?

Regards.

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Message 100564 - Posted: 4 Nov 2016 | 15:19:13 UTC - in response to Message 100557.

It is interesting, are you completely trust to those log files which had been sent you.
Because those logs can be corrupted or modified intentionally (or not).

No, I don't trust them at all. Only if there are two log files from different people giving the same residue for the same candidate will I pay any attention. Otherwise all the residues get loaded into our system and we will send out a single task. If it matches the residue we got in the log file, it validates. If it doesn't, another task is sent out until we get two matching residues. There are something like 18446744073709551614 possible composite residues, so if they match exactly that's good enough for me.

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Message 100566 - Posted: 4 Nov 2016 | 15:38:45 UTC - in response to Message 100270.

I don't have the same factor file as anyone on my 8 valid SOB's. Is this pretty common? Is there any difference between AVX FFT and FM3 FFT? Could AES, AVX, FM3's produce different factors by design? I don't have ECC ram and remember someone saying something about the likely hood of my computer having a memory error was a 50% chance in a 60 day period of time.

Am I the bad computer? How often do computers find the same factor?


If you unhid your computers it would be easier to others to see what is happening.
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Message 100578 - Posted: 4 Nov 2016 | 22:12:31 UTC

Oh, I thought that people with a crown by their name automatically had access to that data.

https://www.primegrid.com/workunit.php?wuid=500058334 The ( ) is always different, should they be finding the same factor file?

LLR Program - Version 3.8.17, using Gwnum Library Version 28.8
Using all-complex FMA3 FFT length 2880K, Pass1=384, Pass2=7680, a = 3
15:30:29 (2956): called boinc_finish

</stderr_txt>
]]>


Using all-complex AVX FFT length 2880K, Pass1=640, Pass2=4608, a = 3
12:05:40 (5892): called boinc_finish

</stderr_txt>
]]>


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Message 100580 - Posted: 4 Nov 2016 | 23:04:41 UTC - in response to Message 100578.

Are you talking specifically about these two lines and the number enclosed in parenthesis?

15:30:29 (2956): called boinc_finish

12:05:40 (5892): called boinc_finish

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Message 100581 - Posted: 5 Nov 2016 | 0:29:14 UTC - in response to Message 100578.

Oh, I thought that people with a crown by their name automatically had access to that data.

https://www.primegrid.com/workunit.php?wuid=500058334 The ( ) is always different, should they be finding the same factor file?

LLR Program - Version 3.8.17, using Gwnum Library Version 28.8
Using all-complex FMA3 FFT length 2880K, Pass1=384, Pass2=7680, a = 3
15:30:29 (2956): called boinc_finish


I'm afraid you're mistaken about several things.

1) The crown icon indicates that a person has contributed money to PrimeGrid to help cover expenses. While we don't currently solicit donations, we did in the past. Donors are otherwise ordinary users and have no special access or privileges.

2) "Factor files". Sieves return factors. 5 is a factor of 15, for example. LLR tasks, however, are checking a single number for primality. It's not looking for factors. Factors and factor files aren't applicable to SoB tasks or any other task that runs LLR.

3) While it's true that admins like myself can in fact see everything, it's a lot easier to use the website tools rather than manually looking in the database. And I can't do that if your computers are hidden. So if you're going to ask for assistance, please help us to help you by unhiding your computers first.

4) The number in parenthesis that I think you're referring to has nothing to do with the result of the calculation. I'm not totally sure what it is, but I'm guessing it's a process number, which is meaningless for most purposes and is essentially random.

I don't have the same factor file as anyone on my 8 valid SOB's.


If your results validated, then your result was identical to the other results. If the results don't match, then they don't get validated.
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Message 100630 - Posted: 6 Nov 2016 | 13:39:09 UTC

The SoB community has certainly had its share of bad news this year, so it's time for some good news.

There's 5 Ks remaining in the Sierpinski Problem.
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Credit: 169,525,599
RAC: 429,032
321 LLR Ruby: Earned 2,000,000 credits (4,015,911)Cullen LLR Ruby: Earned 2,000,000 credits (2,386,067)ESP LLR Ruby: Earned 2,000,000 credits (2,423,530)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,416,766)PPS LLR Ruby: Earned 2,000,000 credits (2,604,459)PSP LLR Ruby: Earned 2,000,000 credits (2,467,489)SoB LLR Ruby: Earned 2,000,000 credits (2,390,486)SR5 LLR Ruby: Earned 2,000,000 credits (2,354,863)SGS LLR Ruby: Earned 2,000,000 credits (2,901,514)TRP LLR Ruby: Earned 2,000,000 credits (3,040,076)Woodall LLR Ruby: Earned 2,000,000 credits (2,249,194)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (3,344,671)PPS Sieve Turquoise: Earned 5,000,000 credits (5,201,453)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,053)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,030,160)AP 26/27 Ruby: Earned 2,000,000 credits (2,433,886)GFN Sapphire: Earned 20,000,000 credits (21,211,034)PSA Double Bronze: Earned 100,000,000 credits (104,053,987)
Message 100637 - Posted: 6 Nov 2016 | 15:58:01 UTC - in response to Message 100630.

The SoB community has certainly had its share of bad news this year, so it's time for some good news.

There's 5 Ks remaining in the Sierpinski Problem.

No way.... could this mean that there's a new optimal sieve depth that would re-open the SoB SV??

Michael GoetzProject donor
Volunteer moderator
Project scientist
Avatar
Send message
Joined: 21 Jan 10
Posts: 9703
ID: 53948
Credit: 107,847,635
RAC: 49,503
321 LLR Amethyst: Earned 1,000,000 credits (1,169,719)Cullen LLR Amethyst: Earned 1,000,000 credits (1,157,331)ESP LLR Amethyst: Earned 1,000,000 credits (1,179,211)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,330,821)PPS LLR Amethyst: Earned 1,000,000 credits (1,254,873)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Ruby: Earned 2,000,000 credits (2,632,795)SR5 LLR Turquoise: Earned 5,000,000 credits (6,048,315)SGS LLR Amethyst: Earned 1,000,000 credits (1,680,461)TRP LLR Amethyst: Earned 1,000,000 credits (1,324,283)Woodall LLR Amethyst: Earned 1,000,000 credits (1,145,077)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,085,723)PPS Sieve Jade: Earned 10,000,000 credits (18,175,834)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (5,881,239)GFN Sapphire: Earned 20,000,000 credits (42,663,419)PSA Jade: Earned 10,000,000 credits (10,028,791)
Message 100642 - Posted: 6 Nov 2016 | 17:24:28 UTC - in response to Message 100637.

The SoB community has certainly had its share of bad news this year, so it's time for some good news.

There's 5 Ks remaining in the Sierpinski Problem.

No way.... could this mean that there's a new optimal sieve depth that would re-open the SoB SV??


While the sieve would indeed be faster without that K, it will also be finding fewer factors without that K. The net effect is that it will still be finding about the same number of factors per unit of time, so the optimal depth won't change much. If anything, I think the sieve would become slightly more optimal, not less.

Besides, if you want to do CPU sieving, there's GCW sieve -- which we need to do before we can start GCW LLR.

What is certain is that there's now a lot less SoB numbers to search. 10223 was the second densest remaining K and comprised 22% of the candidates.

____________

Please do not PM me with support questions. They will usually go unanswered. Ask on the forums instead. Thank you!

Vitaly
Send message
Joined: 24 Sep 12
Posts: 27
ID: 173343
Credit: 11,895,627
RAC: 14,972
ESP LLR Silver: Earned 100,000 credits (285,317)PPS LLR Bronze: Earned 10,000 credits (10,134)PSP LLR Amethyst: Earned 1,000,000 credits (1,080,134)SoB LLR Turquoise: Earned 5,000,000 credits (6,492,139)TRP LLR Bronze: Earned 10,000 credits (46,141)Generalized Cullen/Woodall Sieve Silver: Earned 100,000 credits (364,372)PPS Sieve Ruby: Earned 2,000,000 credits (3,367,629)TRP Sieve (suspended) Bronze: Earned 10,000 credits (22,458)GFN Silver: Earned 100,000 credits (223,935)
Message 100645 - Posted: 6 Nov 2016 | 18:06:14 UTC - in response to Message 100630.
Last modified: 6 Nov 2016 | 19:03:17 UTC

WOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

WE GOT IT

Kelly DaviesProject donor
Send message
Joined: 4 Apr 10
Posts: 91
ID: 58144
Credit: 4,322,688,100
RAC: 2,860,315
321 LLR Ruby: Earned 2,000,000 credits (2,050,518)Cullen LLR Ruby: Earned 2,000,000 credits (2,282,176)ESP LLR Ruby: Earned 2,000,000 credits (3,106,610)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,142,891)PPS LLR Ruby: Earned 2,000,000 credits (2,099,213)PSP LLR Ruby: Earned 2,000,000 credits (3,475,366)SoB LLR Double Bronze: Earned 100,000,000 credits (108,866,266)SR5 LLR Ruby: Earned 2,000,000 credits (3,027,344)SGS LLR Ruby: Earned 2,000,000 credits (3,259,781)TRP LLR Ruby: Earned 2,000,000 credits (2,010,534)Woodall LLR Ruby: Earned 2,000,000 credits (2,077,196)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (3,139,793)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (4,128,706,412)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Sapphire: Earned 20,000,000 credits (24,236,704)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,007,588)AP 26/27 Turquoise: Earned 5,000,000 credits (6,117,059)GFN Jade: Earned 10,000,000 credits (15,782,029)PSA Silver: Earned 100,000 credits (366,040)
Message 100661 - Posted: 6 Nov 2016 | 22:42:38 UTC - in response to Message 100581.



1) The crown icon indicates that a person has contributed money to PrimeGrid to help cover expenses. While we don't currently solicit donations, we did in the past. Donors are otherwise ordinary users and have no special access or privileges.



I donated something like 20 Euros about a year ago but didnt get a crown /cry
Very excited about this find. Cheers
____________
My Lucky Number is 1893*2^1283297+1

Yves Gallot
Volunteer developer
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Joined: 19 Aug 12
Posts: 398
ID: 164101
Credit: 147,766,239
RAC: 216,689
GFN Double Bronze: Earned 100,000,000 credits (147,766,239)
Message 100666 - Posted: 6 Nov 2016 | 23:48:45 UTC - in response to Message 95742.

We should see a prime soon.
"On the number of primes in a sequence" by Yves Gallot

Roger quoted this in a few of his threads. I would post my graph but can not figure out a way to do it


Yes! My crystal ball was right :o)
Next one is around n = 135.000.000, but you may not believe my crystal ball...

Congratulations!

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