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Message boards : Fermat Divisor Search : Duplicate work?

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wwwwww
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Joined: 2 Aug 16
Posts: 3
ID: 453587
Credit: 82,385,792
RAC: 590,127
Found 1 prime in the 2021 Tour de Primes321 LLR Silver: Earned 100,000 credits (107,734)Cullen LLR Silver: Earned 100,000 credits (115,466)ESP LLR Bronze: Earned 10,000 credits (95,246)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (60,966)PPS LLR Gold: Earned 500,000 credits (997,416)PSP LLR Silver: Earned 100,000 credits (111,598)SoB LLR Silver: Earned 100,000 credits (396,973)SR5 LLR Silver: Earned 100,000 credits (229,769)SGS LLR Silver: Earned 100,000 credits (107,248)TRP LLR Gold: Earned 500,000 credits (577,881)Woodall LLR Silver: Earned 100,000 credits (129,002)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,006,310)Generalized Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,006,500)PPS Sieve Ruby: Earned 2,000,000 credits (2,750,736)TRP Sieve (suspended) Silver: Earned 100,000 credits (101,280)AP 26/27 Amethyst: Earned 1,000,000 credits (1,714,232)WW Emerald: Earned 50,000,000 credits (62,604,000)GFN Jade: Earned 10,000,000 credits (10,273,434)
Message 138709 - Posted: 7 Mar 2020 | 17:58:36 UTC

Someone report this prime https://primes.utm.edu/primes/page.php?id=130734 to t5k page. Isn’t this is the same as our k=11 in DIV project?. Does this mean we’re double checking someone else’s work?
____________

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Joined: 5 Apr 14
Posts: 1503
ID: 306875
Credit: 34,126,900
RAC: 9,257
Found 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (529,293)Cullen LLR Gold: Earned 500,000 credits (611,298)ESP LLR Silver: Earned 100,000 credits (139,922)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (35,236)PPS LLR Jade: Earned 10,000,000 credits (12,263,864)PSP LLR Silver: Earned 100,000 credits (212,242)SoB LLR Silver: Earned 100,000 credits (466,812)SR5 LLR Silver: Earned 100,000 credits (145,419)SGS LLR Silver: Earned 100,000 credits (112,277)TRP LLR Silver: Earned 100,000 credits (342,501)Woodall LLR Silver: Earned 100,000 credits (109,455)321 Sieve (suspended) Silver: Earned 100,000 credits (175,037)PPS Sieve Bronze: Earned 10,000 credits (10,113)AP 26/27 Bronze: Earned 10,000 credits (12,129)WW Turquoise: Earned 5,000,000 credits (9,640,000)GFN Amethyst: Earned 1,000,000 credits (1,707,013)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 138711 - Posted: 7 Mar 2020 | 21:34:43 UTC

It means someone (Ryan Propper) is "stealing" PrimeGrid's candidates by searching ahead of our leading edge. PrimeGrid will still have to cover that region. /JeppeSN

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Joined: 10 May 14
Posts: 198
ID: 311759
Credit: 164,015,484
RAC: 324,828
Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,046,192)Cullen LLR Amethyst: Earned 1,000,000 credits (1,357,321)ESP LLR Amethyst: Earned 1,000,000 credits (1,517,922)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,011,992)PPS LLR Ruby: Earned 2,000,000 credits (2,815,240)PSP LLR Amethyst: Earned 1,000,000 credits (1,026,142)SoB LLR Ruby: Earned 2,000,000 credits (2,305,993)SR5 LLR Amethyst: Earned 1,000,000 credits (1,576,257)SGS LLR Ruby: Earned 2,000,000 credits (2,682,790)TRP LLR Amethyst: Earned 1,000,000 credits (1,004,185)Woodall LLR Amethyst: Earned 1,000,000 credits (1,018,066)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,000,211)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,420)PPS Sieve Sapphire: Earned 20,000,000 credits (22,440,747)AP 26/27 Sapphire: Earned 20,000,000 credits (20,077,538)WW Sapphire: Earned 20,000,000 credits (41,124,000)GFN Sapphire: Earned 20,000,000 credits (38,966,939)PSA Sapphire: Earned 20,000,000 credits (20,070,245)
Message 138715 - Posted: 8 Mar 2020 | 2:32:04 UTC

Since we don't have the residues, we are likely double checking some of his work. We do try to be somewhat smart about it, so the prime was automatically removed from our candidates to at least save some tasks.

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Joined: 5 Apr 14
Posts: 1503
ID: 306875
Credit: 34,126,900
RAC: 9,257
Found 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (529,293)Cullen LLR Gold: Earned 500,000 credits (611,298)ESP LLR Silver: Earned 100,000 credits (139,922)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (35,236)PPS LLR Jade: Earned 10,000,000 credits (12,263,864)PSP LLR Silver: Earned 100,000 credits (212,242)SoB LLR Silver: Earned 100,000 credits (466,812)SR5 LLR Silver: Earned 100,000 credits (145,419)SGS LLR Silver: Earned 100,000 credits (112,277)TRP LLR Silver: Earned 100,000 credits (342,501)Woodall LLR Silver: Earned 100,000 credits (109,455)321 Sieve (suspended) Silver: Earned 100,000 credits (175,037)PPS Sieve Bronze: Earned 10,000 credits (10,113)AP 26/27 Bronze: Earned 10,000 credits (12,129)WW Turquoise: Earned 5,000,000 credits (9,640,000)GFN Amethyst: Earned 1,000,000 credits (1,707,013)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 138721 - Posted: 8 Mar 2020 | 7:59:31 UTC

He is now reporting a second Proth find for k=11, so reports both 11*2^8103463 + 1 and 11*2^9381365 + 1 in short succession.

The latter is reported to divide a GF(-, 6).

One gets the expression that he has exhausted Proth k=11 from some point near PrimeGrid's leading edge, to over n=9.3M. However, we cannot be sure he did not skip candidates or make mistakes or have bad residues.

I wonder if he did other low k Proth as well, k≠11.

/JeppeSN

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Joined: 21 Jun 12
Posts: 112
ID: 144858
Credit: 254,060,212
RAC: 66,393
Eliminated 2 conjecture "k"s321 LLR Turquoise: Earned 5,000,000 credits (5,342,838)Cullen LLR Silver: Earned 100,000 credits (158,983)ESP LLR Gold: Earned 500,000 credits (505,527)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,268,642)PPS LLR Sapphire: Earned 20,000,000 credits (45,631,246)PSP LLR Silver: Earned 100,000 credits (120,541)SoB LLR Amethyst: Earned 1,000,000 credits (1,280,028)SR5 LLR Ruby: Earned 2,000,000 credits (2,649,390)SGS LLR Gold: Earned 500,000 credits (518,356)TRP LLR Silver: Earned 100,000 credits (141,131)Woodall LLR Silver: Earned 100,000 credits (116,405)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (235,088)PPS Sieve Amethyst: Earned 1,000,000 credits (1,031,526)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (500,445)TRP Sieve (suspended) Gold: Earned 500,000 credits (507,938)AP 26/27 Turquoise: Earned 5,000,000 credits (5,078,008)WW Ruby: Earned 2,000,000 credits (2,004,000)GFN Double Bronze: Earned 100,000,000 credits (185,681,638)PSA Silver: Earned 100,000 credits (291,533)
Message 138724 - Posted: 8 Mar 2020 | 10:21:00 UTC
Last modified: 8 Mar 2020 | 10:23:38 UTC

Didn't PrimeGrid in the past do exactly the same to other people's reservations at prothsearch.net ?

First this was promised:

"https://web.archive.org/web/20110608154530/http://www.prothsearch.net/index.html" wrote:
Here is how it will work. PrimeGrid will reserve large ranges of k and n. It will perform both a first test and a double-check of all candidates. When it is within weeks of completing this reservation, it will place another reservation for a smaller range of k and n. Of note, some of these ranges will overlap ranges currently reserved to other searchers. PrimeGrid will NOT SEARCH those ranges.

That agreement was then spat upon by PrimeGrid. The ranges were poached by PrimeGrid, the hits were reported by mere days earlier than owners would find them.

So, it is interesting after a number of years to see how the atmosphere that was sowed by PrimeGrid is now being reaped.
____________
My lucky number is Phi(4, 2^2396029-1)/2.

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Joined: 5 Apr 14
Posts: 1503
ID: 306875
Credit: 34,126,900
RAC: 9,257
Found 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (529,293)Cullen LLR Gold: Earned 500,000 credits (611,298)ESP LLR Silver: Earned 100,000 credits (139,922)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (35,236)PPS LLR Jade: Earned 10,000,000 credits (12,263,864)PSP LLR Silver: Earned 100,000 credits (212,242)SoB LLR Silver: Earned 100,000 credits (466,812)SR5 LLR Silver: Earned 100,000 credits (145,419)SGS LLR Silver: Earned 100,000 credits (112,277)TRP LLR Silver: Earned 100,000 credits (342,501)Woodall LLR Silver: Earned 100,000 credits (109,455)321 Sieve (suspended) Silver: Earned 100,000 credits (175,037)PPS Sieve Bronze: Earned 10,000 credits (10,113)AP 26/27 Bronze: Earned 10,000 credits (12,129)WW Turquoise: Earned 5,000,000 credits (9,640,000)GFN Amethyst: Earned 1,000,000 credits (1,707,013)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 138725 - Posted: 8 Mar 2020 | 10:57:45 UTC

serge, do you happen to have full ((x)G)F divisibility information for these two primes by Ryan Propper? All I know is that the larger one divides GF(9381364,6). /JeppeSN

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Joined: 4 Aug 11
Posts: 916
ID: 107307
Credit: 974,532,191
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Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,726,625)Cullen LLR Turquoise: Earned 5,000,000 credits (5,031,868)ESP LLR Turquoise: Earned 5,000,000 credits (5,064,082)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,038,750)PPS LLR Turquoise: Earned 5,000,000 credits (5,000,461)PSP LLR Turquoise: Earned 5,000,000 credits (7,674,374)SoB LLR Sapphire: Earned 20,000,000 credits (42,604,648)SR5 LLR Jade: Earned 10,000,000 credits (11,829,173)SGS LLR Ruby: Earned 2,000,000 credits (2,413,082)TRP LLR Ruby: Earned 2,000,000 credits (2,291,092)Woodall LLR Turquoise: Earned 5,000,000 credits (5,046,412)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,057,614)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,002,919)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,005,451)PPS Sieve Emerald: Earned 50,000,000 credits (52,042,965)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 Jade: Earned 10,000,000 credits (10,742,251)GFN Emerald: Earned 50,000,000 credits (50,000,251)PSA Double Gold: Earned 500,000,000 credits (728,547,693)
Message 138726 - Posted: 8 Mar 2020 | 11:21:40 UTC - in response to Message 138724.

Didn't PrimeGrid in the past do exactly the same to other people's reservations at prothsearch.net ?

First this was promised:
"https://web.archive.org/web/20110608154530/http://www.prothsearch.net/index.html" wrote:
Here is how it will work. PrimeGrid will reserve large ranges of k and n. It will perform both a first test and a double-check of all candidates. When it is within weeks of completing this reservation, it will place another reservation for a smaller range of k and n. Of note, some of these ranges will overlap ranges currently reserved to other searchers. PrimeGrid will NOT SEARCH those ranges.

That agreement was then spat upon by PrimeGrid. The ranges were poached by PrimeGrid, the hits were reported by mere days earlier than owners would find them.

So, it is interesting after a number of years to see how the atmosphere that was sowed by PrimeGrid is now being reaped.

Notice that I didn't say anything about this. It's our users complaining. I just PM'd you the results of a PFGW run on 11*2^8103463+1, seems like there should have been an official comment on it.

It was me who killed the prothsearch.net agreement, it had outlived its usefulness. I did not feel bound by agreements Lennart made. If you're really still mad after all this time I feel sorry for you.

Nobody owns the k=11 Proth candidates and Ryan is welcome to test them if he wants. PrimeGrid will automatically skip over the ones he reported without any human interaction. If Ryan would like to give us any LLR primality residues, we could use them to speed up our testing. But he's certainly under no obligation to do so. So PrimeGrid users, kindly shut up about this.

Message boards : Fermat Divisor Search : Duplicate work?

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