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Message boards : News : World Record Woodall Prime!

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Van ZimmermanProject donor
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Joined: 30 Aug 12
Posts: 1850
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Credit: 4,856,794,517
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Discovered the World's First GFN-20 prime!!!Discovered 2 mega primesFound 1 prime in the 2018 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (20,089,185)Cullen LLR Jade: Earned 10,000,000 credits (15,394,422)ESP LLR Sapphire: Earned 20,000,000 credits (20,089,407)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,037,992)PPS LLR Sapphire: Earned 20,000,000 credits (20,106,782)PSP LLR Sapphire: Earned 20,000,000 credits (20,117,197)SoB LLR Sapphire: Earned 20,000,000 credits (21,208,789)SR5 LLR Jade: Earned 10,000,000 credits (16,162,333)SGS LLR Jade: Earned 10,000,000 credits (14,134,698)TRP LLR Sapphire: Earned 20,000,000 credits (20,619,871)Woodall LLR Jade: Earned 10,000,000 credits (16,756,395)Generalized Cullen/Woodall Sieve Sapphire: Earned 20,000,000 credits (20,322,471)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,051,222,753)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,189,695)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,102,079)AP 26/27 Emerald: Earned 50,000,000 credits (51,669,540)GFN Double Ruby: Earned 2,000,000,000 credits (3,321,856,749)PSA Double Bronze: Earned 100,000,000 credits (186,711,974)
Message 116662 - Posted: 1 Apr 2018 | 13:56:54 UTC

On 21 March 2018, 22:13:39 UTC, PrimeGrid’s Woodall Prime Search found the Woodall mega prime:

17016602*2^17016602-1

Woodall numbers are of the form: W(n)=n*2^n-1. Woodall numbers that are prime are called Woodall primes. For more information, please see “Woodall prime” in The Prime Glossary (http://primes.utm.edu/glossary).

The prime is 5,122,515 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 1st for Woodall primes and 16th overall. This is the 4th largest prime found by PrimeGrid, the 4th Woodall prime found by PrimeGrid, and the first Woodall prime found since December, 2007.

The discovery was made by Diego Bertolotti (ScOrPIoN) of Italy using an Intel(R) Core(TM) i7-2600 CPU at 3.40GHz with 8GB RAM, running Microsoft Windows 10. This computer took about 4 days 6 hours 14 minutes to complete the primality test. Diego is a member of the Boinc @ Italy team.

For more details, please see the official announcement.

Profile RobishProject donor
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Discovered 4 mega primes2018 Tour de Primes largest primeFound 4 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (4,441,554)Cullen LLR Ruby: Earned 2,000,000 credits (2,056,098)ESP LLR Ruby: Earned 2,000,000 credits (2,025,796)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,040,632)PPS LLR Turquoise: Earned 5,000,000 credits (9,704,927)PSP LLR Ruby: Earned 2,000,000 credits (2,038,602)SoB LLR Sapphire: Earned 20,000,000 credits (23,737,574)SR5 LLR Ruby: Earned 2,000,000 credits (2,206,486)SGS LLR Ruby: Earned 2,000,000 credits (2,061,013)TRP LLR Turquoise: Earned 5,000,000 credits (7,622,421)Woodall LLR Ruby: Earned 2,000,000 credits (2,075,371)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,892,369)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,203,944)PPS Sieve Double Gold: Earned 500,000,000 credits (745,985,445)TRP Sieve (suspended) Silver: Earned 100,000 credits (121,416)AP 26/27 Turquoise: Earned 5,000,000 credits (5,057,793)GFN Double Silver: Earned 200,000,000 credits (416,999,830)
Message 116665 - Posted: 1 Apr 2018 | 14:39:27 UTC - in response to Message 116662.



The prime is 5,122,515 digits long



Awesome find Sc0rPIoN, congrats!!!
____________
My lucky numbers are :- 5152128^262144+1 and 56414916^16384+1

JeppeSNProject donor
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321 LLR Bronze: Earned 10,000 credits (48,835)ESP LLR Bronze: Earned 10,000 credits (13,226)PPS LLR Silver: Earned 100,000 credits (418,193)SoB LLR Silver: Earned 100,000 credits (132,293)SR5 LLR Bronze: Earned 10,000 credits (16,010)TRP LLR Bronze: Earned 10,000 credits (14,746)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 116667 - Posted: 1 Apr 2018 | 14:56:30 UTC

I see ScOrPIoN joined a long time ago, so he was not one of the uses who arrived because of the Numberphile video 383 is cool (383 is 3*2^7 - 1 = 6*2^6 - 1, and the video is about Woodall primes and PrimeGrid). It is still interesting to watch the video again. /JeppeSN

dukebg
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Found 1 prime in the 2018 Tour de Primes321 LLR Gold: Earned 500,000 credits (506,942)Cullen LLR Silver: Earned 100,000 credits (104,210)ESP LLR Gold: Earned 500,000 credits (655,642)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (104,481)PPS LLR Silver: Earned 100,000 credits (452,744)PSP LLR Gold: Earned 500,000 credits (561,629)SoB LLR Gold: Earned 500,000 credits (927,999)SR5 LLR Silver: Earned 100,000 credits (487,304)SGS LLR Silver: Earned 100,000 credits (112,037)TRP LLR Gold: Earned 500,000 credits (952,774)Woodall LLR Silver: Earned 100,000 credits (154,039)Generalized Cullen/Woodall Sieve Gold: Earned 500,000 credits (549,916)PPS Sieve Gold: Earned 500,000 credits (701,168)AP 26/27 Silver: Earned 100,000 credits (101,075)GFN Ruby: Earned 2,000,000 credits (2,221,774)
Message 116668 - Posted: 1 Apr 2018 | 15:51:08 UTC

Also of note: last time a Woodall prime was found was December 2007, a bit more than 10 years ago!

Profile Luigi R.Project donor
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321 LLR Bronze: Earned 10,000 credits (77,701)Cullen LLR Silver: Earned 100,000 credits (113,279)ESP LLR Bronze: Earned 10,000 credits (18,290)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (96,108)PPS LLR Ruby: Earned 2,000,000 credits (2,371,996)PSP LLR Silver: Earned 100,000 credits (172,629)SoB LLR Amethyst: Earned 1,000,000 credits (1,232,066)SR5 LLR Bronze: Earned 10,000 credits (16,223)SGS LLR Silver: Earned 100,000 credits (133,431)TRP LLR Bronze: Earned 10,000 credits (21,057)Woodall LLR Silver: Earned 100,000 credits (100,235)Generalized Cullen/Woodall Sieve Silver: Earned 100,000 credits (115,766)PPS Sieve Jade: Earned 10,000,000 credits (11,225,430)TRP Sieve (suspended) Silver: Earned 100,000 credits (108,608)AP 26/27 Amethyst: Earned 1,000,000 credits (1,014,793)GFN Amethyst: Earned 1,000,000 credits (1,605,062)
Message 116703 - Posted: 2 Apr 2018 | 9:53:40 UTC

Wow, what a discovery! Congratulations! :)

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Message boards : News : World Record Woodall Prime!

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