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Message boards : Generalized Fermat Prime Search : Genefer 21 shorter task with 'c' in name -- what is it?

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brucemoregProject donor
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Joined: 24 Jan 21
Posts: 20
ID: 1342803
Credit: 391,516,746
RAC: 2,712,981
Discovered 2 mega primes321 LLR Gold: Earned 500,000 credits (707,549)Cullen LLR Amethyst: Earned 1,000,000 credits (1,045,991)ESP LLR Silver: Earned 100,000 credits (229,023)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (719,318)PPS LLR Ruby: Earned 2,000,000 credits (4,569,422)PSP LLR Ruby: Earned 2,000,000 credits (2,356,211)SoB LLR Gold: Earned 500,000 credits (656,398)SR5 LLR Silver: Earned 100,000 credits (198,301)SGS LLR Bronze: Earned 10,000 credits (91,322)TRP LLR Amethyst: Earned 1,000,000 credits (1,466,920)Woodall LLR Amethyst: Earned 1,000,000 credits (1,633,325)Cullen/Woodall Sieve Silver: Earned 100,000 credits (489,634)PPS Sieve Double Bronze: Earned 100,000,000 credits (178,032,623)AP 26/27 Ruby: Earned 2,000,000 credits (2,898,831)GFN Double Bronze: Earned 100,000,000 credits (166,229,809)WW (retired) Sapphire: Earned 20,000,000 credits (25,548,000)PSA Ruby: Earned 2,000,000 credits (4,644,068)
Message 158146 - Posted: 28 Nov 2022 | 21:54:32 UTC

I'm doing some timing runs, getting ready for the next challenge in December(!!!), and had a couple of these tasks pop up that have a 'c' in the name, e.g., genefer21_68560119c
Looking at a completed 'c' task, noticed this in stderr output:
847396^{2^21} + 1 is checked, ckey = C10EF710D0A86A22, time = 01:28:40
Is the 'c' in the name a designation for a 'ckey' task? If so, what exactly is a ckey task?
I looked at other completed tasks, that were 'normal' aka much longer (like days) and couldn't find a ckey in the task completion info. Also, I googled 'ckey primegrid' and nothing came up . . .

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Yves GallotProject donor
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ID: 164101
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Message 158147 - Posted: 28 Nov 2022 | 22:26:52 UTC - in response to Message 158146.

A Proof task is a quick computation that checks the correctness of a Main task.
With the previous version, the second task was a full test (DC: double-check).
Now the main task generates a "proof" and the second task checks that this proof is valid. The "check-key" is the magic number that proves to the server that the primality test was computed (no cheating) and that no hardware failure occured.
See Verifiable Delay Function for more details.

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brucemoregProject donor
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Joined: 24 Jan 21
Posts: 20
ID: 1342803
Credit: 391,516,746
RAC: 2,712,981
Discovered 2 mega primes321 LLR Gold: Earned 500,000 credits (707,549)Cullen LLR Amethyst: Earned 1,000,000 credits (1,045,991)ESP LLR Silver: Earned 100,000 credits (229,023)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (719,318)PPS LLR Ruby: Earned 2,000,000 credits (4,569,422)PSP LLR Ruby: Earned 2,000,000 credits (2,356,211)SoB LLR Gold: Earned 500,000 credits (656,398)SR5 LLR Silver: Earned 100,000 credits (198,301)SGS LLR Bronze: Earned 10,000 credits (91,322)TRP LLR Amethyst: Earned 1,000,000 credits (1,466,920)Woodall LLR Amethyst: Earned 1,000,000 credits (1,633,325)Cullen/Woodall Sieve Silver: Earned 100,000 credits (489,634)PPS Sieve Double Bronze: Earned 100,000,000 credits (178,032,623)AP 26/27 Ruby: Earned 2,000,000 credits (2,898,831)GFN Double Bronze: Earned 100,000,000 credits (166,229,809)WW (retired) Sapphire: Earned 20,000,000 credits (25,548,000)PSA Ruby: Earned 2,000,000 credits (4,644,068)
Message 158181 - Posted: 30 Nov 2022 | 3:19:20 UTC - in response to Message 158147.

Thank you :)

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Message boards : Generalized Fermat Prime Search : Genefer 21 shorter task with 'c' in name -- what is it?

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