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Message boards : Problems and Help : Unexpected invalid result

Author Message
pyajve
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Joined: 9 Oct 10
Posts: 25
ID: 69762
Credit: 83,619,159
RAC: 83,970
Found 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,009,324)Cullen LLR Ruby: Earned 2,000,000 credits (2,019,159)ESP LLR Ruby: Earned 2,000,000 credits (2,033,022)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,004,720)PPS LLR Turquoise: Earned 5,000,000 credits (7,215,624)PSP LLR Ruby: Earned 2,000,000 credits (2,038,572)SoB LLR Ruby: Earned 2,000,000 credits (2,386,962)SR5 LLR Ruby: Earned 2,000,000 credits (2,513,803)SGS LLR Ruby: Earned 2,000,000 credits (2,291,716)TRP LLR Ruby: Earned 2,000,000 credits (2,051,129)Woodall LLR Ruby: Earned 2,000,000 credits (2,025,650)321 Sieve Turquoise: Earned 5,000,000 credits (6,212,898)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,154,201)PPS Sieve Turquoise: Earned 5,000,000 credits (5,022,681)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,135,080)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,119,667)AP 26/27 Jade: Earned 10,000,000 credits (10,249,005)GFN Jade: Earned 10,000,000 credits (15,240,854)PSA Turquoise: Earned 5,000,000 credits (5,895,092)
Message 137900 - Posted: 14 Feb 2020 | 17:53:20 UTC

Dear fellow crunchers,

One of my computers last night unexpectedly returned an invalid result (meaning double-checker and triple-checker matched while I'm not).
Few prior and further tasks have been validated successfully.
I know this computer previously had a few bad results but the reasons for those have been identified and cleared (naturally, by removing the dust).

The problematic work unit is https://www.primegrid.com/workunit.php?wuid=643799923

Neither blue-screen nor windows updates-caused restart were the case, so I'm wondering what's this time.

While guessings about possible reasons are welcome, I'd like to have the additional verification.
Is it possible to name the number that was tested in that work unit? If so, is it possible to send that number to a fourth computer (preferably, to one of my other two)? I can run a manual LLR on that number and provide the residue to remove any uncertainty about my initial result.

Thank you.
Kind regards, Andrei.

Profile TimTProject donor
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Joined: 2 Dec 11
Posts: 394
ID: 121414
Credit: 1,305,087,867
RAC: 480,570
Discovered 2 mega primesFound 4 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de PrimesFound 12 primes in the 2020 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (21,415,573)Cullen LLR Jade: Earned 10,000,000 credits (14,671,174)ESP LLR Jade: Earned 10,000,000 credits (10,253,423)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,542,115)PPS LLR Sapphire: Earned 20,000,000 credits (31,188,152)PSP LLR Sapphire: Earned 20,000,000 credits (22,003,717)SoB LLR Sapphire: Earned 20,000,000 credits (20,586,237)SR5 LLR Jade: Earned 10,000,000 credits (15,737,085)SGS LLR Sapphire: Earned 20,000,000 credits (20,927,235)TRP LLR Sapphire: Earned 20,000,000 credits (20,495,653)Woodall LLR Jade: Earned 10,000,000 credits (12,770,021)321 Sieve Sapphire: Earned 20,000,000 credits (23,450,078)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (74,346)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,184,525)PPS Sieve Double Gold: Earned 500,000,000 credits (565,517,666)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (287,513)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,074,848)AP 26/27 Double Bronze: Earned 100,000,000 credits (108,603,066)GFN Double Silver: Earned 200,000,000 credits (313,286,768)PSA Emerald: Earned 50,000,000 credits (72,018,672)
Message 137908 - Posted: 15 Feb 2020 | 0:21:27 UTC - in response to Message 137900.

Here's my opinion: If it's just happening once out of 800+ workunits, I would not worry too much about it. If it continues to happen, start looking at the most likely causes (too much heat, overclocking, power, etc).

Profile dannyridel
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Joined: 3 Feb 19
Posts: 275
ID: 1097922
Credit: 1,812,986
RAC: 1,754
321 LLR Bronze: Earned 10,000 credits (51,799)Cullen LLR Bronze: Earned 10,000 credits (18,311)ESP LLR Bronze: Earned 10,000 credits (25,105)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (22,373)PPS LLR Silver: Earned 100,000 credits (144,465)PSP LLR Bronze: Earned 10,000 credits (65,677)SR5 LLR Bronze: Earned 10,000 credits (48,432)SGS LLR Bronze: Earned 10,000 credits (21,194)TRP LLR Bronze: Earned 10,000 credits (39,419)Woodall LLR Bronze: Earned 10,000 credits (19,031)321 Sieve Silver: Earned 100,000 credits (174,427)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (30,033)PPS Sieve Gold: Earned 500,000 credits (552,844)AP 26/27 Bronze: Earned 10,000 credits (52,559)GFN Silver: Earned 100,000 credits (189,280)PSA Silver: Earned 100,000 credits (358,037)
Message 137909 - Posted: 15 Feb 2020 | 0:23:47 UTC - in response to Message 137908.

Agreed. If most (or almost all) tasks are running along regularly, I'd not worry.
____________
JonDan School Services
GFN-14: 50103906^16384+1
AP 21: 104383195353409757+142406036*23#*n for n=0..20

JimBProject donor
Honorary cruncher
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Joined: 4 Aug 11
Posts: 912
ID: 107307
Credit: 974,096,810
RAC: 51,344
Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,671,514)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 (5,000,220)PSP LLR Turquoise: Earned 5,000,000 credits (7,639,762)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 (2,070,105)TRP LLR Ruby: Earned 2,000,000 credits (2,291,092)Woodall LLR Turquoise: Earned 5,000,000 credits (5,046,412)321 Sieve Jade: Earned 10,000,000 credits (10,055,174)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 137922 - Posted: 15 Feb 2020 | 4:02:19 UTC - in response to Message 137900.

Is it possible to name the number that was tested in that work unit? If so, is it possible to send that number to a fourth computer (preferably, to one of my other two)? I can run a manual LLR on that number and provide the residue to remove any uncertainty about my initial result.

If two other computers matched, your computer was wrong. No question about it. Every llr composite result returns an 8-byte residue (16 hexadecimal characters). The number of possible residue values is 18446744073709551616. If two computers agree, it's never just by chance.

Retesting there will just waste CPU time that could be used to test new candidates.

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Message boards : Problems and Help : Unexpected invalid result

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