PrimeGrid Challenges 2023

[Ken g6]

Day 2.5 stats:

Rank___Credits____Username
1______19358080___crashtech
9______9766637____[TA]Skillz
13_____8172014____xii5ku
14_____7024815____markfw
16_____6558222____Pokey
18_____6544581____w a h
32_____4362100____cellarnoise2
34_____4233643____mmonnin
43_____2876296___10esseeTony
45_____2716510____Orange Kid
51_____2253859____parsnip soup in a clay bowl
69_____1800718____biodoc
127____852696_____waffleironhead
140____724832_____Icecold
143____720984_____Skivelitis2
182____493124_____Letin Noxe
213____376487_____Ken_g6
216____361707_____mnelsonx
236____292804_____johnnevermind
239____286809_____kiska
312____122695_____Mardis
391____50585______geecee
459____18332______IEC

Rank__Credits____Team
1_____79907886___TeAm AnandTech
2_____50953300___SETI.Germany
3_____49683998___Czech National Team
4_____43768404___Antarctic Crunchers

I'll be asleep when the challenge finishes. So final stats might not come until tomorrow at this time.

 

[StefanR5R]

So, @crashtech, what's your propellant? Nitromethane? Hydrazine? :-)

Congrats to 1st place!

 

[Ken g6]

More-or-less final stats:

Rank___Credits____Username
1______26359484___crashtech
9______11652372___[TA]Skillz
13_____9792211____xii5ku
14_____9110910____markfw
17_____7805344____w a h
18_____7781638____Pokey
30_____5332769____cellarnoise2
31_____5189471____mmonnin
43_____3579719___10esseeTony
46_____3250299____Orange Kid
48_____2988700____parsnip soup in a clay bowl
52_____2777660____biodoc
133____966916_____waffleironhead
138____898282_____Icecold
146____852536_____Skivelitis2
175____647714_____Letin Noxe
210____470825_____johnnevermind
214____449777_____Ken_g6
220____426181_____mnelsonx
248____321928_____kiska
295____172983_____Mardis
389____62016______geecee
477____18332______IEC

Rank__Credits____Team
1_____100902718__TeAm AnandTech
2_____61800309___SETI.Germany
3_____60235899___Czech National Team
4_____51349172___Antarctic Crunchers

Wow, 100M! And a surprise flush from johnnevermind!

 

[crashtech]

So, @crashtech, what's your propellant? Nitromethane? Hydrazine? :-)

Congrats to 1st place!

It's a secret, the kind that one might find in a clay bowl.

 

[emoga]

I was curios to see what 'dall-e-2' would think of this 'parsnip soup in a clay bowl'.

This one was my favourite one

 

[cellarnoise]

I was curios to see what 'dall-e-2' would think of this 'parsnip soup in a clay bowl'.

This one was my favourite one


View attachment 75315

Looks like some "hot sauce" to me!!! Maybe too much that would hurt at the "end"?

 

[StefanR5R]

Hopefully someone on the TeAm finds a megaprime 🤞

I am not sure how far the validations have progressed by now, but anyway:

• list of most recent PPS-Mega primes (none from the TeAm)
• list of most recent GFN-17 primes (one from the TeAm)

Congrats @crashtech to the find! (Although the one listed so far was found shortly before the challenge.)

 

[Markfw]

I got this email today:


Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is running BOINC, is attached to the PrimeGrid project, and is assigned to the Proth Prime Search (LLR2). What makes this prime unique is that it's large enough to enter the Top 5000 List in Chris Caldwell's The Largest Known Primes Database.

Since you have auto-reporting selected, the following prime was submitted on your behalf:

Added 134842 : 3235*2^3448352+1 (1038061 digits)

This prime was found on this workunit which will automatically show as a prime result after verification by the Largest Known Primes Database.

If you have any questions or concerns, please contact us and we will surely resolve any problems.

Once again, congratulations on your find! Thank you for participating in PrimeGrid.

PrimeGrid staff

 

[StefanR5R]

I am not sure how far the validations have progressed by now, but anyway:

• list of most recent PPS-Mega primes (none from the TeAm)
• list of most recent GFN-17 primes (one from the TeAm)

I got this email today:


Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number.

Indeed, the pages which I linked to received some updates. Finders from the TeAm: markfw at PPS-Mega, parsnip soup at GFN-17.

 

[Skillz]

I got two Primes during the challenge.

136122686^131072+1	1,066,131 (decimal)	2023-01-25 07:34:37 UTC	T5K, task	Generalized Fermat Prime Search	1,444.074
134176868^131072+1	1,065,311 (decimal)	2023-01-25 07:48:44 UTC	T5K, task	Generalized Fermat Prime Search	1,440.671

 

[Ken g6]

Speaking of challenges, the challenge that's not in the challenge list has started: the Tour de Primes.

For the first year ever you're not competing with anybody to be first to return a WU! So the fact that my machines are slow doesn't matter! (Well, doesn't matter as much. )

 

[StefanR5R]

I got two Primes during the challenge.

Loos like validations have finally caught up now — which is less of a matter of volunteers running the proof tasks, but more of a matter of the server getting around to create the proof tasks in the first place.

PPS-Mega:
2023-01-25 02:38:38 UTC — 3235*2^3448352+1 (1,038,061 digits) — markfw

GFN-17:
2023-01-23 01:19:14 UTC — 130198372^131072+1 (1,063,598 digits) — parsnip soup in a clay bowl
2023-01-23 09:19:01 UTC — 131309874^131072+1 (1,064,082 digits) — Icecold
2023-01-23 10:47:40 UTC — 130051980^131072+1 (1,063,534 digits) — xii5ku
2023-01-23 12:27:00 UTC — 131412078^131072+1 (1,064,126 digits) — Pokey
2023-01-23 15:13:51 UTC — 131820886^131072+1 (1,064,126 digits) — Icecold
2023-01-25 07:34:37 UTC — 136122686^131072+1 (1,066,131 digits) — [TA]Skillz
2023-01-25 07:48:44 UTC — 134176868^131072+1 (1,065,311 digits) — [TA]Skillz
2023-01-25 08:21:47 UTC — 136192168^131072+1 (1,066,160 digits) — Skivelitis2
2023-01-25 09:33:13 UTC — 136227118^131072+1 (1,066,175 digits) — parsnip soup in a clay bowl
and these just before or after the challenge:
2023-01-22 00:46:05 UTC — 127720948^131072+1 (1,062,504 digits) — crashtech
2023-01-25 15:08:36 UTC — 134706086^131072+1 (1,065,536 digits) — crashtech

 

[cellarnoise]

I avoid Primes like money it seems

Congrats to all you Prime-lovers!!!

Tomorrow, I am going to find some un-healthy Prime-Rib, unless it costs too much... Then it will be chicken and rice?

 

[Skillz]

I avoid Primes like money it seems

Congrats to all you Prime-lovers!!!

Tomorrow, I am going to find some un-healthy Prime-Rib, unless it costs too much... Then it will be chicken and rice?

Buy more hardware and crunch PG more often.

 

[emoga]

It appears that the average number of tasks required to find a prime within the "Proth Mega Prime Search" is around 1 for every 30,000 tasks? ( N/35 where N is the number of digits of the candidate, [ 1,038,923 digits long / 35 = 29,683.5 ] )

I guess I'll just concentrate on finding a megaprime this month for the tour de primes (since @Icecold stole mine last challenge )

This might be attainable for me. Probably.

 

[Ken g6]

It appears that the average number of tasks required to find a prime within the "Proth Mega Prime Search" is around 1 for every 30,000 tasks? ( N/35 where N is the number of digits of the candidate, [ 1,038,923 digits long / 35 = 29,683.5 ] )

I guess I'll just concentrate on finding a megaprime this month for the tour de primes (since @Icecold stole mine last challenge )

This might be attainable for me. Probably.

The expected number of candidates needed for one prime is e[sup]-γ[/sup] log N / log p[sub]max[/sub], where γ is Euler's constant, N ~ candidate and p[sub]max[/sub] is the sieve limit.
GFN-16 (P badge): 0.5614595 * 2[sup]16[/sup] * log(185e6) / log(120e18) ~ 15150 candidates,
GFN-17 (M badge): 0.5614595 * 2[sup]17[/sup] * log(138e6) / log(250e18) ~ 29400 candidates.
These expected values are the parameter of a Poisson distribution then good luck!

That means ~30k tasks has a ~50% chance of getting a prime. And that count doesn't include tasks you already tried that weren't prime.

 

[emoga]

Ok, doubling it

Little nervous about my chances now, but perhaps that will increase the fun in finding (or not finding) a megaprime🤞

 

[emoga]

Well...that was a little easier than I thought...

PrimePage Primes: 3719 · 2^3451667 + 1

This page contains information about a single prime (discoverer, verification data, submission dates...). This page is about the prime 3719*2^3451667+1.

primes.utm.edu

 

[Ken g6]

Well...that was a little easier than I thought... View attachment 75888

PrimePage Primes: 3719 · 2^3451667 + 1

This page contains information about a single prime (discoverer, verification data, submission dates...). This page is about the prime 3719*2^3451667+1.

primes.utm.edu

And then sometimes you get lucky. I found the second megaprime of 2021, for instance.

Also, congrats to @Kiska on a GFN-16.

 

[Kiska]

Also, congrats to @Kiska on a GFN-16.

I think I got 2

Nevermind it just emailed me twice on the same prime

 

[emoga]

@Kiska Looks like you did find 2 primes. Nice

Prime number list for participant "kiska"

The TeAm is on the scoreboard now with 3 primes...so far...

 

[emoga]

Congrats to @Ken g6 on his GFN16 prime! 😎

Unable to handle request

 

[Ken g6]

Yves Gallot posted this helpful graph. It shows your chance of finding a GFN-16 prime, over the 28 days of February, based on how many tasks you do per day.



The bad news is that we're down to about 21 days left, so your chances are now smaller than this, and they continue to shrink.

 

[Orange Kid]

So 22000+ an no prime...........

 

[Ken g6]

So 22000+ an no prime...........

That's probability for you. You had, maybe, a 75% chance of finding a prime in that size of set of numbers. (22000/28 is just under 800 in that graph.) In those particular numbers you now have a zero percent chance. Everyone's probability of finding (another) prime this month is shrinking, unless they find one, in which case it suddenly jumps to 100%.