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Message boards : 321 Prime Search : More than 60 hours to find a factor?

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Profile BurProject donor
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Posts: 509
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Credit: 398,862,407
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321 LLR Ruby: Earned 2,000,000 credits (2,092,823)Cullen LLR Ruby: Earned 2,000,000 credits (2,315,295)ESP LLR Ruby: Earned 2,000,000 credits (2,151,088)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,620,968)PPS LLR Turquoise: Earned 5,000,000 credits (6,472,188)PSP LLR Ruby: Earned 2,000,000 credits (2,064,832)SoB LLR Ruby: Earned 2,000,000 credits (2,434,466)SR5 LLR Ruby: Earned 2,000,000 credits (2,065,004)SGS LLR Ruby: Earned 2,000,000 credits (2,027,649)TRP LLR Ruby: Earned 2,000,000 credits (2,089,856)Woodall LLR Ruby: Earned 2,000,000 credits (2,112,258)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,107,153)PPS Sieve Turquoise: Earned 5,000,000 credits (5,096,952)AP 26/27 Turquoise: Earned 5,000,000 credits (5,797,662)GFN Jade: Earned 10,000,000 credits (10,714,453)WW Double Silver: Earned 200,000,000 credits (345,684,000)PSA Amethyst: Earned 1,000,000 credits (1,042,601)
Message 143408 - Posted: 18 Sep 2020 | 20:17:57 UTC

I was looking through my stats and from a little over 3000 sieve tasks I found 55 factors or one in 63 tasks. Since each task now takes more than one hour that's 63 hours to eliminate one candidate.

321 LLR takes 8 hours on average, so I could have done 350 or more LLR tests instead of finding 55 composites.

I know the n-range of the sieve is much larger, but still it seems a waste of time to me. When LLR will reach the current n values of the sieve computers will be faster as well, so will they take 63 hours to LLR the same number?

Or am I missing something? I'm quite sure you guys have a good reason to keep the sieve running even now, but could someone please explain? :)
____________
1281979 * 2^485014 + 1 is prime ... no further hits up to: n = 5,600,000

Profile Michael GoetzProject donor
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Credit: 321,920,630
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,132,712)Cullen LLR Turquoise: Earned 5,000,000 credits (5,038,114)ESP LLR Turquoise: Earned 5,000,000 credits (6,177,890)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,094,541)PPS LLR Sapphire: Earned 20,000,000 credits (20,817,335)PSP LLR Turquoise: Earned 5,000,000 credits (7,956,186)SoB LLR Sapphire: Earned 20,000,000 credits (36,067,618)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (4,845,446)TRP LLR Turquoise: Earned 5,000,000 credits (5,084,329)Woodall LLR Turquoise: Earned 5,000,000 credits (5,032,821)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,196)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (22,885,121)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 Jade: Earned 10,000,000 credits (10,902,645)GFN Emerald: Earned 50,000,000 credits (90,173,052)WW Emerald: Earned 50,000,000 credits (51,896,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 143410 - Posted: 18 Sep 2020 | 22:06:39 UTC - in response to Message 143408.

I was looking through my stats and from a little over 3000 sieve tasks I found 55 factors or one in 63 tasks. Since each task now takes more than one hour that's 63 hours to eliminate one candidate.

321 LLR takes 8 hours on average, so I could have done 350 or more LLR tests instead of finding 55 composites.

I know the n-range of the sieve is much larger, but still it seems a waste of time to me. When LLR will reach the current n values of the sieve computers will be faster as well, so will they take 63 hours to LLR the same number?

Or am I missing something? I'm quite sure you guys have a good reason to keep the sieve running even now, but could someone please explain? :)


You answered your own question: We're not just sieving the candidates we're testing now, but also the candidates we'll be testing with LLR years from now. 321 is currently in the n=16M range, and we're sieving up to n=50M. Those tasks will take about 10 times as long to run on LLR as the current tasks.

So, yes, you found 55 factors, but by the end of the sieve file, you would be able to only 35 tasks on LLR rather than the 350 you could do today.

That being said, we just switched to fast double checks, which either makes LLR twice as fast, or the sieve twice as slow. When this is taken into account, we may already be at the point where it's time to stop sieving 321. More information on this aspect will be forthcoming once we decide what we're going to do.
____________
My lucky number is 75898524288+1

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Discovered the World's First AP27!!!Discovered 10 mega primesDiscovered 1 AP272018 Tour de Primes largest primeFound 4 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de PrimesFound 1 prime in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (9,681,253)Cullen LLR Emerald: Earned 50,000,000 credits (50,071,636)ESP LLR Turquoise: Earned 5,000,000 credits (8,577,288)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (19,882,407)PPS LLR Emerald: Earned 50,000,000 credits (81,664,068)PSP LLR Turquoise: Earned 5,000,000 credits (9,600,575)SoB LLR Sapphire: Earned 20,000,000 credits (36,846,875)SR5 LLR Turquoise: Earned 5,000,000 credits (9,986,029)SGS LLR Turquoise: Earned 5,000,000 credits (5,661,056)TRP LLR Sapphire: Earned 20,000,000 credits (28,958,280)Woodall LLR Turquoise: Earned 5,000,000 credits (5,062,771)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,141,753)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,892,369)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,515,338)PPS Sieve Double Gold: Earned 500,000,000 credits (842,736,516)TRP Sieve (suspended) Silver: Earned 100,000 credits (121,416)AP 26/27 Double Bronze: Earned 100,000,000 credits (110,313,255)GFN Double Ruby: Earned 2,000,000,000 credits (4,925,747,290)WW Emerald: Earned 50,000,000 credits (97,564,000)
Message 143412 - Posted: 18 Sep 2020 | 22:17:04 UTC - in response to Message 143410.



That being said, we just switched to fast double checks, which either makes LLR twice as fast, or the sieve twice as slow. When this is taken into account, we may already be at the point where it's time to stop sieving 321. More information on this aspect will be forthcoming once we decide what we're going to do.


Wow I completely missed that. That's a nice dilemma to ponder :)
____________
My lucky numbers 10590941048576+1 and 224584605939537911+81292139*23#*n for n=0..26

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Discovered 1 mega prime321 LLR Gold: Earned 500,000 credits (506,806)Cullen LLR Silver: Earned 100,000 credits (112,212)ESP LLR Silver: Earned 100,000 credits (438,864)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,021,028)PPS LLR Ruby: Earned 2,000,000 credits (2,158,145)PSP LLR Gold: Earned 500,000 credits (616,940)SoB LLR Gold: Earned 500,000 credits (533,625)SR5 LLR Silver: Earned 100,000 credits (145,606)SGS LLR Gold: Earned 500,000 credits (630,754)TRP LLR Silver: Earned 100,000 credits (230,447)Woodall LLR Silver: Earned 100,000 credits (117,864)321 Sieve (suspended) Gold: Earned 500,000 credits (506,814)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (30,033)PPS Sieve Ruby: Earned 2,000,000 credits (2,868,721)AP 26/27 Amethyst: Earned 1,000,000 credits (1,273,545)GFN Turquoise: Earned 5,000,000 credits (5,489,321)WW Turquoise: Earned 5,000,000 credits (7,708,000)PSA Silver: Earned 100,000 credits (373,034)
Message 143418 - Posted: 19 Sep 2020 | 1:46:16 UTC - in response to Message 143412.



That being said, we just switched to fast double checks, which either makes LLR twice as fast, or the sieve twice as slow. When this is taken into account, we may already be at the point where it's time to stop sieving 321. More information on this aspect will be forthcoming once we decide what we're going to do.


Wow I completely missed that. That's a nice dilemma to ponder :)


GOSH! I missed that too!
*starts sieving immediately*
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My lucky number is 6219*2^3374198+1


Profile BurProject donor
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Joined: 25 Feb 20
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Credit: 398,862,407
RAC: 894,181
321 LLR Ruby: Earned 2,000,000 credits (2,092,823)Cullen LLR Ruby: Earned 2,000,000 credits (2,315,295)ESP LLR Ruby: Earned 2,000,000 credits (2,151,088)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,620,968)PPS LLR Turquoise: Earned 5,000,000 credits (6,472,188)PSP LLR Ruby: Earned 2,000,000 credits (2,064,832)SoB LLR Ruby: Earned 2,000,000 credits (2,434,466)SR5 LLR Ruby: Earned 2,000,000 credits (2,065,004)SGS LLR Ruby: Earned 2,000,000 credits (2,027,649)TRP LLR Ruby: Earned 2,000,000 credits (2,089,856)Woodall LLR Ruby: Earned 2,000,000 credits (2,112,258)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,107,153)PPS Sieve Turquoise: Earned 5,000,000 credits (5,096,952)AP 26/27 Turquoise: Earned 5,000,000 credits (5,797,662)GFN Jade: Earned 10,000,000 credits (10,714,453)WW Double Silver: Earned 200,000,000 credits (345,684,000)PSA Amethyst: Earned 1,000,000 credits (1,042,601)
Message 143475 - Posted: 20 Sep 2020 | 5:56:26 UTC - in response to Message 143410.
Last modified: 20 Sep 2020 | 6:05:36 UTC

So, yes, you found 55 factors, but by the end of the sieve file, you would be able to only 35 tasks on LLR rather than the 350 you could do today.
I see, this doesn't take increasing computational speed into account though. I don't know when those candidates will be LLR checked and how strong speed increases, but since even 35 is close to 55 and 321 sieve now is actually slower than 1 h (I saw many 5000 s WUs) it might be a problem?

And leaps in efficiency such as LLR2 might occur again. To me it feels like a lot of CPU time is used for something now that if circumstances change slightly could be a waste. And since sieving is so far ahead of LLR, why not pause?

(once again, I have little experience in this matter, so don't take it as condescending, I'm merely curious)
____________
1281979 * 2^485014 + 1 is prime ... no further hits up to: n = 5,600,000

Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,132,712)Cullen LLR Turquoise: Earned 5,000,000 credits (5,038,114)ESP LLR Turquoise: Earned 5,000,000 credits (6,177,890)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,094,541)PPS LLR Sapphire: Earned 20,000,000 credits (20,817,335)PSP LLR Turquoise: Earned 5,000,000 credits (7,956,186)SoB LLR Sapphire: Earned 20,000,000 credits (36,067,618)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (4,845,446)TRP LLR Turquoise: Earned 5,000,000 credits (5,084,329)Woodall LLR Turquoise: Earned 5,000,000 credits (5,032,821)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,196)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (22,885,121)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 Jade: Earned 10,000,000 credits (10,902,645)GFN Emerald: Earned 50,000,000 credits (90,173,052)WW Emerald: Earned 50,000,000 credits (51,896,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 143483 - Posted: 20 Sep 2020 | 12:55:25 UTC - in response to Message 143475.

...this doesn't take increasing computational speed into account...



You're ignoring the fact that CPU speed will also affect sieves. If we run the sieve in the future, it will be running on those same, super fast 100-th generation Intel or Zen-99 CPUs, or whatever we're running at that point. The ratio of the sieve to the CPU will presumably stay the same. There's no advantage to deferring the sieving.

On the other hand, starting and stopping projects involves a lot of administrative work, and disruption for users. We'd much prefer to get the entire thing done in one shot that to keep starting and stopping it. The only reason we've started and then restarted sieves is because we never imagined we'd need further sieving, not because we thought it was better to defer it to the future.
____________
My lucky number is 75898524288+1

Profile BurProject donor
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321 LLR Ruby: Earned 2,000,000 credits (2,092,823)Cullen LLR Ruby: Earned 2,000,000 credits (2,315,295)ESP LLR Ruby: Earned 2,000,000 credits (2,151,088)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,620,968)PPS LLR Turquoise: Earned 5,000,000 credits (6,472,188)PSP LLR Ruby: Earned 2,000,000 credits (2,064,832)SoB LLR Ruby: Earned 2,000,000 credits (2,434,466)SR5 LLR Ruby: Earned 2,000,000 credits (2,065,004)SGS LLR Ruby: Earned 2,000,000 credits (2,027,649)TRP LLR Ruby: Earned 2,000,000 credits (2,089,856)Woodall LLR Ruby: Earned 2,000,000 credits (2,112,258)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,107,153)PPS Sieve Turquoise: Earned 5,000,000 credits (5,096,952)AP 26/27 Turquoise: Earned 5,000,000 credits (5,797,662)GFN Jade: Earned 10,000,000 credits (10,714,453)WW Double Silver: Earned 200,000,000 credits (345,684,000)PSA Amethyst: Earned 1,000,000 credits (1,042,601)
Message 143503 - Posted: 21 Sep 2020 | 10:33:02 UTC
Last modified: 21 Sep 2020 | 10:36:49 UTC

Ok, I didn't think about that. If there's a breakthrough in LLR similar to LLR2 though, then sieving time might have been wasted. If LLR2 had hit 2 years from now for example.

But I understand that it's a big effort from administrative point of view.
____________
1281979 * 2^485014 + 1 is prime ... no further hits up to: n = 5,600,000

Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,132,712)Cullen LLR Turquoise: Earned 5,000,000 credits (5,038,114)ESP LLR Turquoise: Earned 5,000,000 credits (6,177,890)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,094,541)PPS LLR Sapphire: Earned 20,000,000 credits (20,817,335)PSP LLR Turquoise: Earned 5,000,000 credits (7,956,186)SoB LLR Sapphire: Earned 20,000,000 credits (36,067,618)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (4,845,446)TRP LLR Turquoise: Earned 5,000,000 credits (5,084,329)Woodall LLR Turquoise: Earned 5,000,000 credits (5,032,821)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,196)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (22,885,121)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 Jade: Earned 10,000,000 credits (10,902,645)GFN Emerald: Earned 50,000,000 credits (90,173,052)WW Emerald: Earned 50,000,000 credits (51,896,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 143504 - Posted: 21 Sep 2020 | 11:45:11 UTC - in response to Message 143503.

Ok, I didn't think about that. If there's a breakthrough in LLR similar to LLR2 though, then sieving time might have been wasted. If LLR2 had hit 2 years from now for example.


You can't make decisions based upon what magical hardware or software advances might suddenly appear -- or not appear -- in the indefinite future.

____________
My lucky number is 75898524288+1

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Discovered 1 mega prime321 LLR Gold: Earned 500,000 credits (506,806)Cullen LLR Silver: Earned 100,000 credits (112,212)ESP LLR Silver: Earned 100,000 credits (438,864)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,021,028)PPS LLR Ruby: Earned 2,000,000 credits (2,158,145)PSP LLR Gold: Earned 500,000 credits (616,940)SoB LLR Gold: Earned 500,000 credits (533,625)SR5 LLR Silver: Earned 100,000 credits (145,606)SGS LLR Gold: Earned 500,000 credits (630,754)TRP LLR Silver: Earned 100,000 credits (230,447)Woodall LLR Silver: Earned 100,000 credits (117,864)321 Sieve (suspended) Gold: Earned 500,000 credits (506,814)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (30,033)PPS Sieve Ruby: Earned 2,000,000 credits (2,868,721)AP 26/27 Amethyst: Earned 1,000,000 credits (1,273,545)GFN Turquoise: Earned 5,000,000 credits (5,489,321)WW Turquoise: Earned 5,000,000 credits (7,708,000)PSA Silver: Earned 100,000 credits (373,034)
Message 143506 - Posted: 21 Sep 2020 | 12:45:17 UTC - in response to Message 143504.

Ok, I didn't think about that. If there's a breakthrough in LLR similar to LLR2 though, then sieving time might have been wasted. If LLR2 had hit 2 years from now for example.


You can't make decisions based upon what magical hardware or software advances might suddenly appear -- or not appear -- in the indefinite future.


Think quantum, maybe?
____________
My lucky number is 6219*2^3374198+1


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Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,038,739)Cullen LLR Ruby: Earned 2,000,000 credits (2,074,615)ESP LLR Ruby: Earned 2,000,000 credits (2,243,517)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,142,353)PPS LLR Turquoise: Earned 5,000,000 credits (7,292,925)PSP LLR Ruby: Earned 2,000,000 credits (2,232,103)SoB LLR Ruby: Earned 2,000,000 credits (2,934,612)SR5 LLR Ruby: Earned 2,000,000 credits (2,057,332)SGS LLR Turquoise: Earned 5,000,000 credits (5,231,028)TRP LLR Ruby: Earned 2,000,000 credits (2,420,063)Woodall LLR Ruby: Earned 2,000,000 credits (2,014,811)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (23,770,672)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (944,431)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,813,253)PPS Sieve Double Silver: Earned 200,000,000 credits (342,048,709)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,446,797)AP 26/27 Sapphire: Earned 20,000,000 credits (33,140,471)GFN Sapphire: Earned 20,000,000 credits (49,651,200)WW Turquoise: Earned 5,000,000 credits (7,792,000)PSA Sapphire: Earned 20,000,000 credits (20,457,430)
Message 143559 - Posted: 22 Sep 2020 | 21:20:11 UTC - in response to Message 143506.

Ok, I didn't think about that. If there's a breakthrough in LLR similar to LLR2 though, then sieving time might have been wasted. If LLR2 had hit 2 years from now for example.


You can't make decisions based upon what magical hardware or software advances might suddenly appear -- or not appear -- in the indefinite future.


Think quantum, maybe?


Is that 1 NM die size?

Message boards : 321 Prime Search : More than 60 hours to find a factor?

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