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Message boards : Sophie Germain Prime Search : First prime (the 2nd)

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Profile BurProject donor
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Joined: 25 Feb 20
Posts: 515
ID: 1241833
Credit: 414,481,880
RAC: 163
321 LLR Ruby: Earned 2,000,000 credits (2,092,823)Cullen LLR Ruby: Earned 2,000,000 credits (2,315,295)ESP LLR Ruby: Earned 2,000,000 credits (2,151,088)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,620,968)PPS LLR Jade: Earned 10,000,000 credits (16,474,243)PSP LLR Ruby: Earned 2,000,000 credits (2,064,832)SoB LLR Ruby: Earned 2,000,000 credits (2,434,466)SR5 LLR Ruby: Earned 2,000,000 credits (2,065,004)SGS LLR Ruby: Earned 2,000,000 credits (2,042,656)TRP LLR Ruby: Earned 2,000,000 credits (2,089,856)Woodall LLR Ruby: Earned 2,000,000 credits (2,112,258)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,107,153)PPS Sieve Turquoise: Earned 5,000,000 credits (5,096,952)AP 26/27 Turquoise: Earned 5,000,000 credits (5,797,662)GFN Jade: Earned 10,000,000 credits (11,994,022)WW (retired) Double Silver: Earned 200,000,000 credits (349,980,000)PSA Amethyst: Earned 1,000,000 credits (1,042,601)
Message 140587 - Posted: 3 Jun 2020 | 18:01:44 UTC
Last modified: 3 Jun 2020 | 18:02:54 UTC

I couldn't reply in the old thread, probably due to it being old. So here's a new one.

After just 7000 WUs I noticed a task taking close to 4000 s and after a few hours received a mail saying I found a prime. Something like 350,000 digits, so noting special, but since it's the frist I found, I was somewhat excited. :D

I have a question though, were the tests for twin prime and SG prime already done? Or will that be a seperate WU? In other words, can I keep my fingers crossed?


And maybe it's of use to some others, I was tracking the probability for finding a prime. This can be done by p = 1-(1-1/x)^n where x is the number of WUs it takes to find a prime (you can get this from the stats page, right now it's something like x = 14450 for SGS) and n is the number of tasks one has processed so far.

So finding one after only 7000 tasks has a 39% chance, combined with me finishing 1st only in about 45% of all WUs, this had a 17% chance to happen so soon. So even if it's not a special prime, I'm still feeling lucky. ;)

Profile JeppeSNProject donor
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Joined: 5 Apr 14
Posts: 1825
ID: 306875
Credit: 50,048,284
RAC: 13,777
Found 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (593,283)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 (19,817,667)PSP LLR Gold: Earned 500,000 credits (598,093)SoB LLR Silver: Earned 100,000 credits (466,812)SR5 LLR Silver: Earned 100,000 credits (210,142)SGS LLR Silver: Earned 100,000 credits (136,265)TRP LLR Silver: Earned 100,000 credits (476,246)Woodall LLR Silver: Earned 100,000 credits (281,400)321 Sieve (suspended) Silver: Earned 100,000 credits (175,037)Cullen/Woodall Sieve Bronze: Earned 10,000 credits (22,952)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 (4,980,148)WW (retired) Jade: Earned 10,000,000 credits (13,756,000)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 140588 - Posted: 3 Jun 2020 | 18:12:52 UTC

No need to keep fingers crossed. The prime shows up on your account (when I click your name here in the forum) already, so it does not have any "companion".

The fact that it has no twin was established by your own work, which is why this task took longer than ordinary tasks in this project.

The fact that it is not Sophie Germain (or safe, although the current sieve does not give a good chance for safe primes) was established by the server already.

Congratulations with your prime.

/JeppeSN

Profile Eudy SilvaProject donor
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Joined: 26 Aug 17
Posts: 2153
ID: 918937
Credit: 611,895,820
RAC: 485,526
Discovered 4 mega primesFound 2 primes 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 PrimesFound 1 prime in the 2023 Tour de Primes321 LLR Amethyst: Earned 1,000,000 credits (1,187,213)Cullen LLR Amethyst: Earned 1,000,000 credits (1,349,947)ESP LLR Amethyst: Earned 1,000,000 credits (1,151,976)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,199,207)PPS LLR Sapphire: Earned 20,000,000 credits (31,742,136)PSP LLR Ruby: Earned 2,000,000 credits (2,356,601)SoB LLR Ruby: Earned 2,000,000 credits (2,432,091)SR5 LLR Turquoise: Earned 5,000,000 credits (5,976,080)SGS LLR Amethyst: Earned 1,000,000 credits (1,849,514)TRP LLR Ruby: Earned 2,000,000 credits (2,010,675)Woodall LLR Amethyst: Earned 1,000,000 credits (1,231,973)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,119,749)Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (14,084,624)Generalized Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,005,331)PPS Sieve Double Bronze: Earned 100,000,000 credits (100,101,845)AP 26/27 Double Bronze: Earned 100,000,000 credits (100,120,852)GFN Double Bronze: Earned 100,000,000 credits (140,732,435)WW (retired) Double Silver: Earned 200,000,000 credits (200,192,000)PSA Ruby: Earned 2,000,000 credits (2,059,222)
Message 140590 - Posted: 3 Jun 2020 | 19:03:46 UTC

Congrats, Bur !
____________

"Accidit in puncto, quod non contingit in anno."
Something that does not occur in a year may, perchance, happen in a moment.

Message boards : Sophie Germain Prime Search : First prime (the 2nd)

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