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Message boards : Number crunching : Heptadecagenarian Challenge

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Profile Michael GutierrezProject donor
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Joined: 21 Mar 17
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Found 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de PrimesESP LLR Silver: Earned 100,000 credits (398,507)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (604,364)PPS LLR Sapphire: Earned 20,000,000 credits (24,262,178)PSP LLR Amethyst: Earned 1,000,000 credits (1,042,842)SoB LLR Ruby: Earned 2,000,000 credits (2,363,005)SR5 LLR Amethyst: Earned 1,000,000 credits (1,246,270)SGS LLR Gold: Earned 500,000 credits (668,871)TRP LLR Ruby: Earned 2,000,000 credits (2,193,907)Woodall LLR Amethyst: Earned 1,000,000 credits (1,085,552)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,322,841)Generalized Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,085,904)PPS Sieve Silver: Earned 100,000 credits (256,196)AP 26/27 Silver: Earned 100,000 credits (101,075)GFN Ruby: Earned 2,000,000 credits (3,676,038)WW Ruby: Earned 2,000,000 credits (3,756,000)PSA Silver: Earned 100,000 credits (108,393)
Message 153181 - Posted: 10 Jan 2022 | 22:44:17 UTC
Last modified: 13 Jan 2022 | 17:07:29 UTC

Welcome to the Heptadecagenarian Challenge!

The FIRST challenge of the 2022 Series will be a 3-day challenge offered on the GFN17-LOW and GFN17-MEGA subprojects, beginning 17 January 17:17 UTC and ending 20 January 17:17 UTC.

We have a lot of 17-related festivities upcoming! Well, two mostly. PrimeGrid is turning 17 this year -- it was founded in July 2005, making it one of the oldest still-active BOINC projects! And, of course, we are probably less than one challenge away from finishing all GFN17-LOW tasks. Will we find the largest GFN prime less than 1,000,000 digits? Time will tell!

On that note, be aware that we very likely will finish GFN17-LOW during the course of the challenge, so you should select both LOW and MEGA if you don't want your computers to be running idle for part of it.

To participate in the Challenge, please select only the GFN17-LOW and/or GFN17-MEGA subprojects in your PrimeGrid preferences section.

Application Builds

    IMPORTANT: Overclocking -- including factory overclocking -- on Nvidia GPUs is very strongly discouraged. Even if your GPU can run other tasks without difficulty, it may be unable to run GFN tasks when overclocked.

    Supported platforms:
  • Windows: Nvidia GPU (OpenCL): 32 bit, AMD/ATI GPU (OpenCL): 32 bit, CPU: 64 bit, 32 bit
  • Linux: Nvidia GPU (OpenCL): 32 bit, 64 bit, AMD/ATI GPU (OpenCL): 32 bit, 64 bit, CPU: 64 bit, 32 bit
  • Mac: Nvidia GPU (OpenCL): 64 bit, AMD/ATI GPU (OpenCL): 64 bit, CPU: 64 bit, 32 bit




A Cautionary Reminder

    ATTENTION: The primality programs Genefer (for CPUs) and GeneferOCL (for GPUs) are computationally intensive; so, it is vital to have a stable system with good cooling. It does not tolerate "even the slightest of errors." Please see this post for more details on how you can "stress test" your CPU, and please see this post for tips on running GFN on your GPU successfully.

    As with all number crunching, excessive heat can potentially cause permanent hardware failure. Please ensure your cooling system is sufficient.

    GFN17-LOW WU's are currently averaging 2 hours on CPU and 6 minutes on GPU.
    GFN17-MEGA WU's are currently averaging 3 hours on CPU and 9 minutes on GPU.
    For a general idea of how your GPU stacks up, you can have a look at the fastest GPUs list.

    If your CPU is highly overclocked, please consider "stress testing" it. Overclocking your GPU is not recommended at all for GeneferCUDA. Sieving is an excellent alternative for computers that are not able to run Genefer. :)

    Please, please, please make sure your machines are up to the task.



Time zone converter:


    The World Clock - Time Zone Converter

    NOTE: The countdown clock on the front page uses the host computer time. Therefore, if your computer time is off, so will the countdown clock. For precise timing, use the UTC Time in the data section to the left of the countdown clock.



Scoring information


    Scores will be kept for individuals and teams. Only work units issued AFTER January 17th 17:17:00 UTC and received BEFORE January 20th 17:17:00 UTC will be considered for credit.

    We will be using the same scoring method as we currently use for BOINC credits. A quorum of 2 is NOT needed to award Challenge score - i.e. no double checker. Therefore, each returned result will earn a Challenge score. Please note that if the result is eventually declared invalid, the score will be removed.



At the Conclusion of the Challenge


    We kindly ask users "moving on" to ABORT their WU's instead of DETACHING, RESETTING, or PAUSING.

    ABORTING WU's alows them to be recycled immediately; thus a much faster "clean up" to the end of a challenge. DETACHING, RESETTING, and PAUSING WU's causes them to remain in limbo until they EXPIRE. Therefore, we must wait until WU's expire to send them out to be completed.

    Please consider either completing what's in the queue or ABORTING them. Thank you. :)



More information on Generalized Fermat Numbers and the Genefer program



Best of Luck to everyone!
____________

Time flies like an arrow. Fruit flies like a banana.

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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 (174,818)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (112,799)PPS LLR Jade: Earned 10,000,000 credits (14,255,854)PSP LLR Silver: Earned 100,000 credits (428,457)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)GFN Ruby: Earned 2,000,000 credits (4,139,305)WW Turquoise: Earned 5,000,000 credits (9,640,000)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 153209 - Posted: 11 Jan 2022 | 17:40:10 UTC - in response to Message 153181.

Will we find the largest prime number less than 1,000,000 digits?

Propper & Batalov have a 999999-digit prime which is impossible to beat with a GFN-17. /JeppeSN

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Discovered 2 mega primesFound 2 primes in the 2018 Tour de PrimesFound 4 primes in the 2019 Tour de PrimesFound 3 primes in the 2020 Tour de PrimesFound 1 mega prime in the 2020 Tour de PrimesFound 4 primes in the 2021 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (25,376,005)Cullen LLR Sapphire: Earned 20,000,000 credits (20,754,874)ESP LLR Sapphire: Earned 20,000,000 credits (20,453,074)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (31,669,159)PPS LLR Emerald: Earned 50,000,000 credits (51,079,843)PSP LLR Sapphire: Earned 20,000,000 credits (20,571,669)SoB LLR Emerald: Earned 50,000,000 credits (50,873,282)SR5 LLR Sapphire: Earned 20,000,000 credits (21,257,664)SGS LLR Sapphire: Earned 20,000,000 credits (21,624,107)TRP LLR Sapphire: Earned 20,000,000 credits (20,191,201)Woodall LLR Sapphire: Earned 20,000,000 credits (20,376,385)321 Sieve (suspended) Emerald: Earned 50,000,000 credits (55,630,889)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,178,073)Generalized Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (56,046,594)PPS Sieve Double Gold: Earned 500,000,000 credits (521,014,891)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (9,468,384)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,076,645)AP 26/27 Double Gold: Earned 500,000,000 credits (502,006,216)GFN Double Silver: Earned 200,000,000 credits (264,673,321)WW Double Silver: Earned 200,000,000 credits (378,432,000)PSA Double Bronze: Earned 100,000,000 credits (126,200,096)
Message 153210 - Posted: 11 Jan 2022 | 17:52:01 UTC

Whee!

I finally scored an RTX 3080 card for not much more than we should have been paying all along (wanted a ti, but at this point, I'll take just about anything that isn't gouging my wallet), and with more luck it will show up at my house before the challenge is over.

Now to see if I can score off my final prime digit guess!
____________
Eating more cheese on Thursdays.

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Discovered 8 mega primesFound 5 primes in the 2020 Tour de PrimesFound 2 mega primes in the 2020 Tour de PrimesFound 4 primes in the 2021 Tour de PrimesFound 2 mega primes in the 2021 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (20,020,701)Cullen LLR Sapphire: Earned 20,000,000 credits (20,174,451)ESP LLR Sapphire: Earned 20,000,000 credits (23,496,803)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (50,473,530)PPS LLR Emerald: Earned 50,000,000 credits (61,332,778)PSP LLR Emerald: Earned 50,000,000 credits (51,069,305)SoB LLR Emerald: Earned 50,000,000 credits (51,885,310)SR5 LLR Sapphire: Earned 20,000,000 credits (20,183,763)SGS LLR Sapphire: Earned 20,000,000 credits (20,482,069)TRP LLR Sapphire: Earned 20,000,000 credits (20,307,419)Woodall LLR Sapphire: Earned 20,000,000 credits (46,027,900)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,380,527)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (744,531)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,007,004)PPS Sieve Double Gold: Earned 500,000,000 credits (578,571,690)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,181)AP 26/27 Sapphire: Earned 20,000,000 credits (31,418,153)GFN Double Gold: Earned 500,000,000 credits (527,774,700)WW Double Ruby: Earned 2,000,000,000 credits (2,000,640,000)
Message 153211 - Posted: 11 Jan 2022 | 18:27:35 UTC - in response to Message 153209.
Last modified: 11 Jan 2022 | 18:30:50 UTC

Will we find the largest prime number less than 1,000,000 digits?

Propper & Batalov have a 999999-digit prime which is impossible to beat with a GFN-17. /JeppeSN

What no! I thought this could be fun. Seeing what may happen.
Are you sure impossible? Another 999999 could be possible?
Calm down - we are still talking a GFN17 low - highest one?
The thing you said is different?

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Credit: 38,879,857
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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 (174,818)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (112,799)PPS LLR Jade: Earned 10,000,000 credits (14,255,854)PSP LLR Silver: Earned 100,000 credits (428,457)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)GFN Ruby: Earned 2,000,000 credits (4,139,305)WW Turquoise: Earned 5,000,000 credits (9,640,000)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 153212 - Posted: 11 Jan 2022 | 19:08:47 UTC - in response to Message 153211.

Will we find the largest prime number less than 1,000,000 digits?

Propper & Batalov have a 999999-digit prime which is impossible to beat with a GFN-17. /JeppeSN

What no! I thought this could be fun. Seeing what may happen.
Are you sure impossible? Another 999999 could be possible?
Calm down - we are still talking a GFN17 low - highest one?
The thing you said is different?


A 999999-digit GFN-17 prime (which would be uncovered in this month) is possible (but unlikely).

However, the number I linked is incredibly close to having 1 million digits. Its first many many figures are 9. There are absolutely no GFN-17 candidates that lie between it and the threshold 1 million digits. Even if you went to GFN-1 (so b2+1 instead of b131072+1), there still would not be even a single candidate in the range needed to beat the linked prime without being a mega-digit number.

So we can find a 999999-digit prime (but it is unlikely), but we cannot find one which beats the Propper-Batalov record.

/JeppeSN

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Credit: 185,995,075
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321 LLR Ruby: Earned 2,000,000 credits (3,923,182)Cullen LLR Gold: Earned 500,000 credits (558,789)ESP LLR Ruby: Earned 2,000,000 credits (2,090,896)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,877,927)PPS LLR Jade: Earned 10,000,000 credits (12,343,960)PSP LLR Turquoise: Earned 5,000,000 credits (5,199,623)SoB LLR Ruby: Earned 2,000,000 credits (2,959,742)SR5 LLR Ruby: Earned 2,000,000 credits (3,227,665)SGS LLR Amethyst: Earned 1,000,000 credits (1,434,518)TRP LLR Amethyst: Earned 1,000,000 credits (1,670,091)Woodall LLR Amethyst: Earned 1,000,000 credits (1,097,642)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,940,256)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (72,639)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (40,416)PPS Sieve Emerald: Earned 50,000,000 credits (61,840,404)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (19,337)TRP Sieve (suspended) Bronze: Earned 10,000 credits (34,240)AP 26/27 Turquoise: Earned 5,000,000 credits (5,567,211)GFN Emerald: Earned 50,000,000 credits (74,554,027)WW Ruby: Earned 2,000,000 credits (3,552,000)
Message 153216 - Posted: 12 Jan 2022 | 4:44:46 UTC

Scoring information

Scores will be kept for individuals and teams. Only work units issued AFTER January 17th 17:17:00 UTC and received BEFORE January 20th 17:17:00 UTC will be considered for credit.

In this challenge we will be using the same scoring algorithm as we use to determine BOINC credits, including bonuses! Because the score bonuses are included in the challenge score, it is advantageous to run the longer tasks if you can manage to finish them within the 10 day challenge window. This will land you a higher position in the leaderboard and therefor a higher score on the overall leaderboard.


10 or 3?
____________

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 (4,470,298)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 (89,351,961)WW Emerald: Earned 50,000,000 credits (50,024,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 153219 - Posted: 12 Jan 2022 | 12:12:02 UTC - in response to Message 153216.
Last modified: 12 Jan 2022 | 12:13:12 UTC

Scoring information

Scores will be kept for individuals and teams. Only work units issued AFTER January 17th 17:17:00 UTC and received BEFORE January 20th 17:17:00 UTC will be considered for credit.

In this challenge we will be using the same scoring algorithm as we use to determine BOINC credits, including bonuses! Because the score bonuses are included in the challenge score, it is advantageous to run the longer tasks if you can manage to finish them within the 10 day challenge window. This will land you a higher position in the leaderboard and therefor a higher score on the overall leaderboard.


10 or 3?


3.

Also, the bonuses are the same, so from a scoring perspective it really doesn’t matter which you run.

However, 17-Low is almost finished, and assuming it doesn’t end before the challenge starts, it will almost certainly end in the first day of the challenge. I strongly recommend that 17-MEGA is selected so that your computer doesn’t run out of tasks during the challenge.

For this challenge, running GFN-17-LOW is optional but running GFN-17-MEGA is REQUIRED.
____________
My lucky number is 75898524288+1

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Joined: 4 Jul 07
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Found 1 prime in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,241,901)Cullen LLR Turquoise: Earned 5,000,000 credits (5,091,796)ESP LLR Turquoise: Earned 5,000,000 credits (5,231,559)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (4,379,484)PPS LLR Turquoise: Earned 5,000,000 credits (6,783,835)PSP LLR Turquoise: Earned 5,000,000 credits (6,179,598)SoB LLR Turquoise: Earned 5,000,000 credits (6,974,827)SR5 LLR Turquoise: Earned 5,000,000 credits (5,097,090)SGS LLR Ruby: Earned 2,000,000 credits (4,172,238)TRP LLR Turquoise: Earned 5,000,000 credits (5,088,607)Woodall LLR Turquoise: Earned 5,000,000 credits (5,063,163)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,070,431)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,270)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,001,914)PPS Sieve Sapphire: Earned 20,000,000 credits (26,509,601)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,145,806)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,056,568)AP 26/27 Jade: Earned 10,000,000 credits (10,784,704)GFN Sapphire: Earned 20,000,000 credits (25,047,278)WW Jade: Earned 10,000,000 credits (14,296,000)PSA Emerald: Earned 50,000,000 credits (54,270,405)
Message 153221 - Posted: 12 Jan 2022 | 13:11:42 UTC - in response to Message 153088.

from 17 January 17:17 UTC to 20 January 17:17 UTC.


For the fun, you may run the project to 20 January 20:20 UTC.

It's a little more than 3 days, but...
____________
Badge Score: 1*2 + 3*5 + 10*6 + 4*7 + 2*8 + 1*9 = 130

Profile Michael GoetzProject donor
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Joined: 21 Jan 10
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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 (4,470,298)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 (89,351,961)WW Emerald: Earned 50,000,000 credits (50,024,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 153223 - Posted: 12 Jan 2022 | 15:38:32 UTC - in response to Message 153221.

from 17 January 17:17 UTC to 20 January 17:17 UTC.


For the fun, you may run the project to 20 January 20:20 UTC.

It's a little more than 3 days, but...


To be clear, tasks received after 17:17 on the 20th will NOT count for the challenge.
____________
My lucky number is 75898524288+1

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Discovered 1 mega primeFound 3 primes in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,023,600)Cullen LLR Ruby: Earned 2,000,000 credits (2,016,794)ESP LLR Sapphire: Earned 20,000,000 credits (20,186,009)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,224,466)PPS LLR Sapphire: Earned 20,000,000 credits (20,020,201)PSP LLR Ruby: Earned 2,000,000 credits (3,043,852)SoB LLR Ruby: Earned 2,000,000 credits (2,031,453)SR5 LLR Turquoise: Earned 5,000,000 credits (9,775,333)SGS LLR Ruby: Earned 2,000,000 credits (2,035,177)TRP LLR Ruby: Earned 2,000,000 credits (2,740,707)Woodall LLR Ruby: Earned 2,000,000 credits (2,046,592)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,440,175)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,911,344)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,077,092)PPS Sieve Emerald: Earned 50,000,000 credits (50,200,870)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,034,014)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,774)AP 26/27 Sapphire: Earned 20,000,000 credits (23,591,723)GFN Double Bronze: Earned 100,000,000 credits (107,485,684)WW Emerald: Earned 50,000,000 credits (50,104,000)PSA Emerald: Earned 50,000,000 credits (52,866,806)
Message 153233 - Posted: 13 Jan 2022 | 1:48:50 UTC

I have been mostly crunching 17low pushing towards the end of the project for a long while now (although I did stray away as WW started and for TdP) last year. I look forward to the culmination of 17low. It will be fun.
____________

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Found 1 prime in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,241,901)Cullen LLR Turquoise: Earned 5,000,000 credits (5,091,796)ESP LLR Turquoise: Earned 5,000,000 credits (5,231,559)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (4,379,484)PPS LLR Turquoise: Earned 5,000,000 credits (6,783,835)PSP LLR Turquoise: Earned 5,000,000 credits (6,179,598)SoB LLR Turquoise: Earned 5,000,000 credits (6,974,827)SR5 LLR Turquoise: Earned 5,000,000 credits (5,097,090)SGS LLR Ruby: Earned 2,000,000 credits (4,172,238)TRP LLR Turquoise: Earned 5,000,000 credits (5,088,607)Woodall LLR Turquoise: Earned 5,000,000 credits (5,063,163)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,070,431)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,270)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,001,914)PPS Sieve Sapphire: Earned 20,000,000 credits (26,509,601)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,145,806)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,056,568)AP 26/27 Jade: Earned 10,000,000 credits (10,784,704)GFN Sapphire: Earned 20,000,000 credits (25,047,278)WW Jade: Earned 10,000,000 credits (14,296,000)PSA Emerald: Earned 50,000,000 credits (54,270,405)
Message 153236 - Posted: 13 Jan 2022 | 10:29:49 UTC - in response to Message 153223.

from 17 January 17:17 UTC to 20 January 17:17 UTC.


For the fun, you may run the project to 20 January 20:20 UTC.

It's a little more than 3 days, but...


To be clear, tasks received after 17:17 on the 20th will NOT count for the challenge.


My bad. I was not asking people to do it, it was a suggestion for an official end date of the challenge.
____________
Badge Score: 1*2 + 3*5 + 10*6 + 4*7 + 2*8 + 1*9 = 130

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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 (4,470,298)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 (89,351,961)WW Emerald: Earned 50,000,000 credits (50,024,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 153237 - Posted: 13 Jan 2022 | 11:28:47 UTC - in response to Message 153236.
Last modified: 13 Jan 2022 | 11:29:28 UTC

from 17 January 17:17 UTC to 20 January 17:17 UTC.


For the fun, you may run the project to 20 January 20:20 UTC.

It's a little more than 3 days, but...


To be clear, tasks received after 17:17 on the 20th will NOT count for the challenge.


My bad. I was not asking people to do it, it was a suggestion for an official end date of the challenge.


Challenges currently must be an integer number of days.
____________
My lucky number is 75898524288+1

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Joined: 1 Mar 14
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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 1 prime in the 2021 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,011,570)Cullen LLR Jade: Earned 10,000,000 credits (10,009,374)ESP LLR Jade: Earned 10,000,000 credits (10,009,221)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,012,217)PPS LLR Jade: Earned 10,000,000 credits (16,296,722)PSP LLR Jade: Earned 10,000,000 credits (10,044,081)SoB LLR Jade: Earned 10,000,000 credits (10,064,750)SR5 LLR Jade: Earned 10,000,000 credits (10,002,051)SGS LLR Jade: Earned 10,000,000 credits (10,001,295)TRP LLR Jade: Earned 10,000,000 credits (10,002,411)Woodall LLR Jade: Earned 10,000,000 credits (10,013,921)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,004,228)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,047,667)PPS Sieve Sapphire: Earned 20,000,000 credits (20,866,490)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,043,271)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,015,177)AP 26/27 Sapphire: Earned 20,000,000 credits (20,045,194)GFN Emerald: Earned 50,000,000 credits (55,355,287)WW Sapphire: Earned 20,000,000 credits (27,744,000)PSA Double Silver: Earned 200,000,000 credits (200,301,443)
Message 153240 - Posted: 13 Jan 2022 | 14:39:03 UTC
Last modified: 13 Jan 2022 | 14:47:20 UTC

Once again - A BIG RED WARNING

We're going to finish GFN-17 Low subproject in this challenge. It mean that "GFN-17 LOW" subproject will RUN OUT OF TASKS DURING CHALLENGE. For sure. Anytime. May be even in first few hours.

It means:

- DO NOT SELECT ONLY "GFN-17 LOW" PROJECT in your preferences. To be on safe side, select both projects (GFN-17 Low and GFN-17 MEGA). In this mode you'll receive a random mix of both types of tasks. When GFN-17 Low will run out of work, server will send you GFN-17 MEGA tasks only. No further actions will be required.

- If you want to be risky and wish to run GFN-17 Low tasks only as long as possible, keep an eye on number of available tasks, which is displayed on main page of the site, for example:

Generalized Fermat Prime Search (n=17 low) 1986 / 287K

Currently GFN-17 Low has about 287000 tasks available. When this number goes down significantly, change your preferences and enable GFN-17 MEGA immediately! Remember that it's very dangerous, tasks can be completely drained very fast, even in few minutes, right in the beginning of the challenge.

- If your configuration is wrong and you'll run out of tasks, your computers will stay idle and you'll not receive any challenge score. Once again, a simplest way to avoid this is to select both GFN-17 Low and GFN-17 MEGA projects in your computing preferences.

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Discovered 6 mega primesFound 16 primes in the 2018 Tour de PrimesFound 1 prime in the 2018 Tour de Primes Mountain StageFound 15 primes in the 2019 Tour de PrimesFound 1 mega prime in the 2019 Tour de PrimesFound 22 primes in the 2020 Tour de PrimesFound 1 mega prime in the 2020 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (8,220,422)Cullen LLR Ruby: Earned 2,000,000 credits (3,663,353)ESP LLR Turquoise: Earned 5,000,000 credits (7,488,518)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (7,196,629)PPS LLR Emerald: Earned 50,000,000 credits (60,275,102)PSP LLR Jade: Earned 10,000,000 credits (12,245,601)SoB LLR Jade: Earned 10,000,000 credits (17,010,038)SR5 LLR Ruby: Earned 2,000,000 credits (2,914,257)SGS LLR Ruby: Earned 2,000,000 credits (3,190,607)TRP LLR Turquoise: Earned 5,000,000 credits (8,091,782)Woodall LLR Ruby: Earned 2,000,000 credits (3,833,516)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,172,809)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (13,345,448)PPS Sieve Double Silver: Earned 200,000,000 credits (227,623,404)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (164,235)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,142,550)AP 26/27 Emerald: Earned 50,000,000 credits (67,275,520)GFN Double Silver: Earned 200,000,000 credits (474,562,025)WW Jade: Earned 10,000,000 credits (14,760,000)PSA Amethyst: Earned 1,000,000 credits (1,142,791)
Message 153258 - Posted: 14 Jan 2022 | 23:57:53 UTC - in response to Message 153181.
Last modified: 15 Jan 2022 | 0:05:22 UTC

To Funny that Thousands of Low Tasks were aborted today so that will give us more to run during the Contest. :)

What is the Highest Prime that Low can find?

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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 (174,818)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (112,799)PPS LLR Jade: Earned 10,000,000 credits (14,255,854)PSP LLR Silver: Earned 100,000 credits (428,457)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)GFN Ruby: Earned 2,000,000 credits (4,139,305)WW Turquoise: Earned 5,000,000 credits (9,640,000)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 153261 - Posted: 15 Jan 2022 | 9:38:13 UTC - in response to Message 153258.


What is the Highest Prime that Low can find?

Not sure if I misunderstand the question, but it goes up to (and not including) 1 million digits. So the largest prime Low could find would have 999'999 digits. Also see my thread Guess the number of digits in the LAST GFN-17-LOW prime.

If you ask about the b, it is b = 10^(999999/131072) = 42'597'773.68...

The last even integer before that is 42'597'772. However, 42597772^131072+1 is not a candidate after sieving, since it has a small factor 7*2^20+1. In the same way, b=42597770 has small factor 159*2^19+1. So you could ask about b=42597768.

Does anyone remember how deeply sieved GFN-17 (low) is?

/JeppeSN

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Message 153262 - Posted: 15 Jan 2022 | 11:28:37 UTC - in response to Message 153261.

Does anyone remember how deeply sieved GFN-17 (low) is?

250·1018. See Generalized Fermat Number Sieving Results.

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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 (174,818)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (112,799)PPS LLR Jade: Earned 10,000,000 credits (14,255,854)PSP LLR Silver: Earned 100,000 credits (428,457)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)GFN Ruby: Earned 2,000,000 credits (4,139,305)WW Turquoise: Earned 5,000,000 credits (9,640,000)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 153265 - Posted: 15 Jan 2022 | 12:51:41 UTC - in response to Message 153262.

Does anyone remember how deeply sieved GFN-17 (low) is?

250·1018. See Generalized Fermat Number Sieving Results.

Thanks, Yves. My PARI script did not go to p = 250·1018. However, searching for 42597768 on PrimeGrid's Discord server found an old post (I think by JimB) where it is confirmed that 42597768 survived the sieving. So 42597768131072+1 is the largest candidate of 17 Low.

Of course, many users will now run a manual Genefer test on this one to check if it is prime...

/JeppeSN

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