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Tour de Primes 2015
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 Michael Goetz  Volunteer moderator
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Tour de Primes 2015
Welcome to the 7th annual Tour de Primes. 2 is the first prime number...and the only even one. This makes it unique among prime numbers. Therefore, February is declared Prime month...being the 2nd month of the year. :) And there's no better way to pay homage to a prime number than to go out and find one. :) More precisely, a Top 5000 prime.
For the month of February, an informal competition is offered. There are no points to be gained or awards to be won...just a simple rare jersey at the end of the month to add to your badge list. No pressure or stress other than what you put on yourself. :)
 Yellow Jersey - prime count leader
 Green Jersey - points (prime score) leader
 Polk-a-dot Jersey - on the 19th of February we'll have a "mountain" stage and award the Polk-a-dot Jersey to the one who finds the most primes on that day (tiebreaker will be prime score for that day).
Results will be available at http://www.primegrid.com/challenge/tdp_2015.php.
As with last year, for all primes (BOINC and PRPNet) we're using the new reporting system whereby the prime's date of discovery determines whether it's eligible for the Tour de Primes. Prior to 2014, the date of verification for BOINC primes was used while the discovery date was used for PRPNet primes. The current system is more intuitive and fairer.
Currently, the fastest opportunities to find Top 5000 primes is with the SGS (LLR) and PPSE (LLR) projects. Of course, should someone find a prime in the higher n searches, this would pretty much guarantee the green jersey. Should you bag a GFN prime, whether it's a world record or "small" one, you're pretty sure of a win too. All ports in PRPNet except for the GFN32768 port are also available for the competition.
To participate in BOINC SGS (LLR) or PPSE(LLR), all you have to do is select it in your PrimeGrid preferences.
To participate in PRPNet, please see the Welcome to PRPNet thread.
We strongly recommend disabling hyperthreading, or if that's not possible, only running 50% of your cores for LLR, PFGW, and Genefer. I.e., anything that can find primes. This usually produces better overall performance as well as cooler temperatures.
Good Luck, have fun, and enjoy! :D
Previous Winners
 - [DPC]x-RaY99_the_one_man_team
 - [DPC]x-RaY99_the_one_man_team
 - Lonnie Christensen
 - [DPC]x-RaY99_the_one_man_team
 - [DPC]x-RaY99_the_one_man_team
 - PBT_marian_boss
 - Scott Brown
 - Usucapio Libertatis
 - Scott Brown
 - shanky123
 - [BOINCstats] LostBoy
 - Snf*
 - lennart
 - lennart
 - [SG]marodeur6
 - lennart
 - s-yama
 - lennart
Full rankings can be seen here: 2009 | 2010 | 2011 | 2012 | 2013 | 2014
Totals by Year
2009 2010 2011 2012 2013 2014
Total Primes found 212 309 766 646 238 254
Total Score 457.30 2663.27 21803.72 20727.04 15614.83 20982.77
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My lucky number is 75898524288+1
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Lucky I am riding 50 miles a day. I have been training for this race.:) | |
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Michael Goetz Volunteer moderator
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The following consists of my opinion only, so feel free to disagree. :)
All projects below are LLR, NOT sieves. You can't find primes with sieves!
For those wondering, PPSE is probably the fastest way to find primes. SGS numbers are slightly smaller, but PPSE takes less time to crunch. Everything else on BOINC takes much longer to run, crunches larger numbers, and is less likely to find a prime. If you're trying to win one of the jerseys, PPSE is probably the way to go. Note that from a project admin perspective, I'd rather people crunch SGS because PPSE is eventually going to push the SGS leading edge out of the Top 5K list, so I don't really want to encourage PPSE. However, it is the best option for TDP. I personally plan on crunching PPSE until I get the next badge, then I'll switch to SGS.
Want to win the green jersey (highest prime score) by finding one big prime? That's tricky, because in last year's TDP even an SR5 mega prime wasn't large enough to win the green jersey. You would need about a 1.4 million digit prime to have won last year's green jersey. That rules out the BOINC SR5 and PPS-MEGA projects. Of course, it's possible the yellow jersey winner will have a lower total prime score this year, so maybe a smaller "big" prime will be sufficient.
If you're shooting for the green jersey, probably the best BOINC alternatives are ESP and TRP. One of those primes will probably be enough to win the green jersey.
On the PRPNet side, GCW is in the 1.4M digit range, so it's a good choice for finding that "big" prime for the green jersey. I'm not sure how fast those tests are. It's possible the tests are somewhat slower than expected both because of the large k and because the base isn't 2.
The 27 port is also around 1.4M digits, has a small k and is base 2, so it's probably a better bet than GCW. It might be the best choice for a single prime that could win the green jersey.
Remember: The GFN32768 port is not eligible (because the numbers are too small), and sieves can't find primes. Every other port and sub-project is eligible for TDP.
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Remember: The GFN32768 port is not eligible (because the numbers are too small), and sieves can't find primes. Every other port and sub-project is eligible for TDP.
I know that they would be VERY special primes and would be added to special "top 20" lists, etc., but neither Wieferich nor Wall-Sun-Sun are large enough to be on the top 5000 list. So they wouldn't count as well? (They would be awfully small in prime score anyway).
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Michael Goetz Volunteer moderator
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Remember: The GFN32768 port is not eligible (because the numbers are too small), and sieves can't find primes. Every other port and sub-project is eligible for TDP.
I know that they would be VERY special primes and would be added to special "top 20" lists, etc., but neither Wieferich nor Wall-Sun-Sun are large enough to be on the top 5000 list. So they wouldn't count as well? (They would be awfully small in prime score anyway).
Been thinking this one over...
The main reason for the "Top 5K" rule is so that people wouldn't crunch REALLY small numbers just for the TDP yellow jersey.
Nobody in their right mind is going to crunch Wieferich or WSS in an attempt to score high in the TDP. :)
So, yes, for 2015, if you find a WWWW prime (NOT a near WWWW prime, but an actual WSS or Wieferich prime), it will count. The score will be miniscule as far as the green jersey is concerned, but it will count as 1 prime for the yellow jersey.
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Of course, WFS and WSS are not finding new primes, but rather testing known small(ish) primes for particular identities. Still, a new Wieferich or first Wall-Sun-Sun find would be a great achievement!
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3073428256125*2^1290000-1 is Prime! | |
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Of course, WFS and WSS are not finding new primes, but rather testing known small(ish) primes for particular identities. Still, a new Wieferich or first Wall-Sun-Sun find would be a great achievement!
Interesting.
In fact, for a number n it should be faster to check if 2^(n - 1) == 1 (mod n^2) than it is to establish with a deterministic test that n is a prime (not just a probable-prime/pseudoprime).
I think our WWWW applications work by first filtering out "most" composite numbers in the search interval and then testing the Wieferich congruence 2^(n - 1) == 1 (mod n^2) on the remaining n.
Composite numbers satisfying 2^(n - 1) == 1 (mod n^2) are even more rare than Wieferich primes, see this MathOverflow thread.
/JeppeSN | |
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Good luck, crunchers. "I hope your first prime will be a massively large prime", to paraphrase Luca Brasi in "The Godfather". | |
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about how many primes are typically found in a month for PPSe and SGS?
I have a pretty good idea that other projects getting primes typically are announcement-worthy. But if SGS and PPSe primes are not, because they are relatively common..
It means its an arms race. I think 3 laptops is barely a computing array, but there are much bigger guns out there. Perhaps I'm best served looking for one large, but rare & unlikely prime?
I'm not entirely sure what "prime score" is. That's the highest ranking prime found this month on the top 5000 list, right? it sounds.. like it might be the sum of multiple ranks.
...idk. But luck is a fickle thing. maybe I'm best served taking a path less traveled | |
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I'm not entirely sure what "prime score" is. That's the highest ranking prime found this month on the top 5000 list, right? it sounds.. like it might be the sum of multiple ranks.
It's no so much about ranking, it's about prime digits.
In other words, prime score is a method to recognize the "size" of the prime found such that it can be compared to primes of other types
For prime score formula and example, see this post
For many examples, see PrimeGrid Primes by Project or Top Prime Finders
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In other words the score for prime p is proportional to (log p)^3 * log log p. /JeppeSN | |
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Michael Goetz Volunteer moderator
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about how many primes are typically found in a month for PPSe and SGS?
They may say that there's no such thing as a bad question, but there's definitely such a thing as a "good question". For me, that means a question where I don't know what the answer is, but wish I did.
This is a good question.
These days, most of our primes come on BOINC, and it's easy to get that data. This is based on actual primes found over approximately the last year.
+------------+-------------+----------------+
| SubProject | TotalPrimes | PrimesPerMonth |
+------------+-------------+----------------+
| PPSE | 906 | 73.0645 |
| SGS | 482 | 38.8710 |
| PPS | 197 | 15.8871 |
| SR5 | 12 | 0.9677 |
| MEG | 6 | 0.4839 |
| TRP | 2 | 0.1613 |
| 321 | 1 | 0.0806 |
| ESP | 1 | 0.0806 |
+------------+-------------+----------------+
On the PRPNet side, in the last year, we found six MEGA primes (before it move to BOINC), two primes on the 27 port of the 27121 project, and 29 GFN32768 primes.
A few things to note about the raw statistics.
1) Don't draw ANY conclusions from any of the "rates" of mega primes. Those are so hard to find that it's pure luck whether we find lots of them or none at all.
2) The large number of GFN32768 primes is primarily due to a single person crunching over the last month and a half. GFN32768 primes are too small to be reported to the Top 5000 primes list.
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Michael Goetz Volunteer moderator
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In case anyone is breathlessly sitting in front of their computer screen, pounding on the F5 key to refresh the TDP leaderboard page, it usually only gets updated once an hour at the 30 minute mark.
It won't show primes until they're reported and verified on the Top 5000 Primes website, and we check their site once an hour. Assuming their site is up and running, the TDP page will show new primes a few seconds after the bottom of the hour.
The exception is any primes found on PRPNet, or any BOINC GFN primes. Those need to be added to the TDP scoreboard by hand.
The first TDP prime should show up on the leaderboard just after 13:30:00, about 18 minutes from now.
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Michael Goetz Volunteer moderator
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Curious about the process of what happens after your computer returns a prime?
BOINC:
1) If it's not a mega prime, you wait for your wingman to return a result that also says the number is prime. It's very rare for a computation error to result in a false prime indication, EXCEPT when b=2 and c=-1. That affects SGS, TRP, Woodall, and some 321 tests. With the algorithm used for those numbers, computation errors frequently result in false primes. We don't get excited about those primes until the wingman returns the same result since it's often just someone with too much overclocking.
2) If it IS a mega prime, we speed up the wingman process a bit by verifying the prime on our own computers. We also run it through PFGW just in case there's a bug in LLR.
2a) If b=2 and c=1, we also start checking for Fermat divisors on our computers. The server will do this automatically, but our computers are several times faster. (No AVX on the servers.)
2b) Finally, once we've verified the prime ourselves, we inhibit additional wingmen for the mega prime. The wingman who is currently running can finish his task and become the official double checker, but if he doesn't, no other tasks gets sent out. This means we don't have to wait months and months for a wingman to verify the prime.
3) Once the wingman verifies the prime (or we do it, as in 2b above), the server then does additional testing on some primes. As mentioned above, we check for Fermat divisors on numbers where b=2 and c=1, and on SGS primes we check for Sophie Germain pairs by checking k*2^(n-1)-1 and k*2^(n+1)-1 on the server. Your computer would have already done an additional check for a twin prime by checking k*2^n+1.
4) Once the additional checks are done in either 2a or 3, we're ready to report the prime. If you have set your PrimeGrid preferences to permit PrimeGrid to report the primes for you, we will do so. Unless there's a specific reason that you want to report it yourself, we recommend you let us do it. It's easy to make mistakes and you need to know which programs and projects you should be listing as contributing to the prime discovery. We've got that all automated and it's much easier for us to do it. We'll create your account, set up the proof codes, etc.
4a) If you haven't given us permission to report for you, we notify you by email and you have to report the prime yourself. We will make every effort to get in contact with you but if 19 days go by and we can't reach you, we'll let the double checker report the prime instead.
5) After the prime is submitted, the prime is verified by the Top 5K website. Once it's been verified, it shows up on their list.
6) Once an hour, our server looks at the list on the Top 5K website and makes note of any new primes, and marks them as "reported" in our database. Once they're marked as reported, they can be displayed. (This is the point where primes will show up on the Tour de Primes leaderboard.)
7) A few minutes after we check Top 5K, we put newly reported primes into another, permanent part of our database. This is when primes will show up on most of the other parts of the website.
PRPNet:
1) Mostly the same as BOINC, except that there's no wingman and we do everything by hand.
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Michael Goetz Volunteer moderator
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I posted the following information, based on the last year's data:
+------------+-------------+----------------+
| SubProject | TotalPrimes | PrimesPerMonth |
+------------+-------------+----------------+
| PPSE | 906 | 73.0645 |
| SGS | 482 | 38.8710 |
I realized that may be misleading. Looking at that, you would think it's twice as easy to find PPSE primes as SGS primes. It's not. At least it's not anymore.
Until late last year, PPSE was smaller than SGS, but it's now surpassed SGS in size. SGS is now the smallest primes we're testing on BOINC.
Looking at just the last month, this is what that table looks like:
+------------+-------------+----------------+
| SubProject | TotalPrimes | PrimesPerMonth |
+------------+-------------+----------------+
| PPSE | 58 | 58 |
| SGS | 50 | 50 |
PPSE and SGS are pretty close to each other right now, so either is a good choice for finding primes quickly for the Tour de Primes challenge. As time goes on, PPSE numbers will be getting larger, and PPSE primes will become rarer. Eventually SGS will be the absolute best place to find top 5K primes. At least for a couple of years. Eventually, PPSE will push the leading edge of SGS off the top 5K list altogether.
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Michael Goetz Volunteer moderator
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It's the first of the month -- so there must be a new mega prime!
Although we're still verifying it, it's unlikely to be wrong, so it looks like our streak of consecutive months with a mega prime is now up to 15 in a row!
And someone will have a nice head start towards the TDP green Jersey. :)
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Michael Goetz Volunteer moderator
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Odds of finding a prime:
I dove into the database, looking at the number of numbers checked vs. the number of primes. As with all statistics, take them with a grain of salt, especially those where the number of primes is very small. The numbers below are the average number of tests needed to find one prime (i.e., the total number of tests divided by the number of primes.)
PPSE: 13,061
SGS: 17,312
SR5: 26,815
PPS: 29,323
MEGA: 40,650
TRP: 60,386
ESP: 90,647
321: 142,451
The other BOINC projects haven't had any primes recently enough, or ever, to produce meaningful statistics.
One reason to be a little suspicious of these numbers is that in many cases, the data spans a long period of time and includes a lot of tests. Normally, you would think having a large data set would be a good thing -- but in most of these projects, the size of the numbers grow over time and therefore the likelihood of finding a prime decreases over time. For those projects, therefore, we're currently searching larger numbers than those which comprise the basis for the statistics. As a result, the statistics are overly optimistic.
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Michael Goetz Volunteer moderator
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It's the first of the month -- so there must be a new mega prime!
Although we're still verifying it, it's unlikely to be wrong, so it looks like our streak of consecutive months with a mega prime is now up to 15 in a row!
And someone will have a nice head start towards the TDP green Jersey. :)
159*2^3425766+1
Congratulations go to Evelyn Chew of Australia for finding the first mega prime in this year's Tour de Primes!
Will it be enough to win the Green Jersey? 27 days to go...
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My annual TdP prime is already there, so I can concentrate on finding a big one now. :)
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159*2^3425766+1
Congratulation go to Evelyn Chew of Australia for finding the first mega prime in this year's Tour de Primes!
So by now it is known if 159*2^3425766+1 divides a Fermat number and/or some generalized Fermat numbers?
/JeppeSN | |
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Michael Goetz Volunteer moderator
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159*2^3425766+1
Congratulation go to Evelyn Chew of Australia for finding the first mega prime in this year's Tour de Primes!
So by now it is known if 159*2^3425766+1 divides a Fermat number and/or some generalized Fermat numbers?
/JeppeSN
Click on the link. :)
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My lucky number is 75898524288+1 | |
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Curious about the process of what happens after your computer returns a prime?
BOINC:
1) If it's not a mega prime, you wait for your wingman to return a result that also says the number is prime. It's very rare for a computation error to result in a false prime indication, EXCEPT when b=2 and c=-1. That affects SGS, TRP, Woodall, and some 321 tests. With the algorithm used for those numbers, computation errors frequently result in false primes. We don't get excited about those primes until the wingman returns the same result since it's often just someone with too much overclocking.
2) If it IS a mega prime, we speed up the wingman process a bit by verifying the prime on our own computers. We also run it through PFGW just in case there's a bug in LLR.
2a) If b=2 and c=1, we also start checking for Fermat divisors on our computers. The server will do this automatically, but our computers are several times faster. (No AVX on the servers.)
2b) Finally, once we've verified the prime ourselves, we inhibit additional wingmen for the mega prime. The wingman who is currently running can finish his task and become the official double checker, but if he doesn't, no other tasks gets sent out. This means we don't have to wait months and months for a wingman to verify the prime.
3) Once the wingman verifies the prime (or we do it, as in 2b above), the server then does additional testing on some primes. As mentioned above, we check for Fermat divisors on numbers where b=2 and c=1, and on SGS primes we check for Sophie Germain pairs by checking k*2^(n-1)-1 and k*2^(n+1)-1 on the server. Your computer would have already done an additional check for a twin prime by checking k*2^n+1.
4) Once the additional checks are done in either 2a or 3, we're ready to report the prime. If you have set your PrimeGrid preferences to permit PrimeGrid to report the primes for you, we will do so. Unless there's a specific reason that you want to report it yourself, we recommend you let us do it. It's easy to make mistakes and you need to know which programs and projects you should be listing as contributing to the prime discovery. We've got that all automated and it's much easier for us to do it. We'll create your account, set up the proof codes, etc.
4a) If you haven't given us permission to report for you, we notify you by email and you have to report the prime yourself. We will make every effort to get in contact with you but if 19 days go by and we can't reach you, we'll let the double checker report the prime instead.
5) After the prime is submitted, the prime is verified by the Top 5K website. Once it's been verified, it shows up on their list.
6) Once an hour, our server looks at the list on the Top 5K website and makes note of any new primes, and marks them as "reported" in our database. Once they're marked as reported, they can be displayed. (This is the point where primes will show up on the Tour de Primes leaderboard.)
7) A few minutes after we check Top 5K, we put newly reported primes into another, permanent part of our database. This is when primes will show up on most of the other parts of the website.
PRPNet:
1) Mostly the same as BOINC, except that there's no wingman and we do everything by hand.
Great set of posts Michael. This particular one should be a sticky somewhere. Cheers
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Michael Goetz Volunteer moderator
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We're nearly 25% through the month of February, and we're on a pace to set a record highest total prime score for the TDP -- and simultaneously also on a pace to possibly set a record lowest score for the number of primes!
The primes just keeping larger and larger.
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Curious about the process of what happens after your computer returns a prime?
At what point in this process does the count of primes found for the subproject on my account page get updated?
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Michael Goetz Volunteer moderator
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Curious about the process of what happens after your computer returns a prime?
At what point in this process does the count of primes found for the subproject on my account page get updated?
That's a good question! The answer isn't what you'd think. The count of primes actually goes up before you can see the prime.
It's at the beginning of step 3, when the wingman verifies the prime, the task is validated and credit is granted. That's when the counters are incremented.
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Does TdP have multi-project participation, or only PrimeGrid? It would be pretty exciting if other PRPNet servers could participate who also have ranges to test that are Top 5000, say like No Prime Left Behind. | |
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Does TdP have multi-project participation, or only PrimeGrid? It would be pretty exciting if other PRPNet servers could participate who also have ranges to test that are Top 5000, say like No Prime Left Behind.
Just us. Even if I wanted to do something like that (I do not), there would be technical obstacles preventing it.
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Does TdP have multi-project participation, or only PrimeGrid? It would be pretty exciting if other PRPNet servers could participate who also have ranges to test that are Top 5000, say like No Prime Left Behind.
Just us. Even if I wanted to do something like that (I do not), there would be technical obstacles preventing it.
I suspect not as bad as you think. Users can just add more port lines from other projects into their PRPNet client. The other projects would manually report primes to PG for inclusion in the TdP Prime List, which would show the other project in the Project column (how many Top 5000 would expect from any other project in a day?). PrimeGrid would be the coordinating site. That's more of an organizing problem, not a technical problem. | |
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That's more of an organizing problem, not a technical problem.
Who would get badge/jersey, if such a person wouldn't be even registered on PG?
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159*2^3425766+1
Congratulations go to Evelyn Chew of Australia for finding the first mega prime in this year's Tour de Primes!
Believe it or not, congratulations again to Evelyn for also finding the second mega-prime of February!
113*2^3437145+1
But that's not the only news this morning...
267*2^2662090+1 is a Factor of F2662088!!!!
Congratulations to Jay Parangalan for discovering this 801372 digit prime. It is the third largest Fermat divisor ever discovered!
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That's more of an organizing problem, not a technical problem.
Who would get badge/jersey, if such a person wouldn't be even registered on PG?
That's for the other project to determine. PG would just have to win it back the next year. | |
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composite wrote: That's more of an organizing problem, not a technical problem.
Honza wrote: Who would get badge/jersey, if such a person wouldn't be even registered on PG?
composite wrote: That's for the other project to determine. PG would just have to win it back the next year.
Ahh - I didn't answer the question. You question is about the PG database. I was thinking of using a placeholder user ID and team ID for the external project if the prime finder doesn't have a PG id. To show a jersey in PG badges, or to have a personal list of primes found, a user needs to already have a PG id, or sign up for one. | |
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But that's not the only news this morning...
267*2^2662090+1 is a Factor of F2662088!!!!
Congratulations to Jay Parangalan for discovering this 801372 digit prime. It is the third largest Fermat divisor ever discovered!
That is cool. Apparently the first Fermat factor (universally, not just by PrimeGrid) since December. Congratulations to stellarfirefly. /JeppeSN | |
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Michael Goetz Volunteer moderator
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The "Mountain Stage" will start in about 10 hours -- a 24-hour sprint to see who can find the most primes (tiebreaker will be prime score, if needed.)
Remember that it's the time the prime is returned to PrimeGrid that counts, and there's some delay before primes show up on the leader board, so the results won't be final until I've verified there's no hidden primes waiting in the pipeline. I'll remove the red warning from the leaderboard once all the primes are processed.
The race for the green and yellow jerseys is somewhat of a nail-biter so far. For the yellow jersey (number of primes), three people have pulled away in a pack:
tng* 13 primes
Randall J. Scalise 12 primes
Scott Brown 11 primes
For the green jersey, it's a pack of two:
Randall J. Scalise 2840.837869625425
Crackenback 2686.354506413364
What's interesting about the race for the green jersey is that Randall J. Scalise has amassed his score with small and medium size primes, while most of Crackenback's score comes from the two mega-primes she's found this month.
With 10 days to go, both races are tight, and there's plenty of time for someone to come from far behind and catch up. That's especially true for the green jersey, where all it takes is one lucky find to win the whole thing.
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That is real nice but how does know if one has found a prime while one is processing more WU's? | |
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That is real nice but how does know if one has found a prime while one is processing more WU's?
You will get an email if you're the discoverer of the prime. (Only the prime finder gets notified by email. If you're the double checker, you don't usually get notified by email, although the prime will show up in your account.)
This is a good opportunity to remind everyone to set up their Prime Reporting Preferences if they have not already done so. If you go to the PrimeGrid Preferences page, please fill in the three items under "Reporting primes to the Prime Pages."
Your Real Name (both given and surname) is required for submission. We also strongly recommend that you check the first box which gives PrimeGrid permission to report the primes for you. It's not an intuitive process, and for most people there's no reason to do it yourself. (One of the few reasons is if you already have an account at the Top 5000 website from primes you previously found before PrimeGrid.) Please save yourself a lot of potential aggravation, as well as possibly missing out on being credited with the discovery, and check that box unless you have a reason not to.
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I'd echo the recommendation to let Primegrid do the submitting. Lot easier than doing it manually.
I think the only possible problem might be if you have the same name as someone else who is there already. So it might be worth checking if there is, and if so, maybe use a variation of your real name e.g. by using a middle initial also. | |
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With about 7 hours to go in the 24-hour Mountain Stage we have our first Mountain Stage prime showing on the leader boards. There's several more in the pipeline that aren't displayed yet. They're waiting either for verification by wingmen, or for the reporting process.
Will one prime be enough to win 2015's polka-dot jersey?
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Will one prime be enough to win 2015's polka-dot jersey?
It was enough on the last 2 editions, if I remember. three years ago, the winner reached the amazing score of 8 prime numbers.
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676754^262144+1 is prime | |
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At the rate I'm going at, I think I'd be lucky to get one prime the whole month... | |
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At the rate I'm going at, I think I'd be lucky to get one prime the whole month...
Me too!
(I did manage to be the double checker on two primes, but that doesn't count.)
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At the rate I'm going at, I think I'd be lucky to get one prime the whole month...
Me too!
All I want is one. If I get one in one of three of the projects I am running I should get the green jersey. Yes, I am a optimist.
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I have been very lucky, found 4 total so far this month, and wingman on two.
Did find the very first one this month, would be cool to find the last one too.
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Thanks for the heads up on the prime reporting. I set mine up to the good.... | |
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At the rate I'm going at, I think I'd be lucky to get one prime the whole month...
Me too!
All I want is one. If I get one in one of three of the projects I am running I should get the green jersey. Yes, I am a optimist.
I'm optimist as well - searching long projects. Though a caveat: Most of you have found a prime or double checked. Since I have zero primes via double checker or first - my chances are the same finding Genefer/SOB/PSP/WOO as smaller numbers. Hope springs eternal for lucky server draw to send a prime (at any time) winning the green Jersey.
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Will one prime be enough to win 2015's polka-dot jersey?
Looks like the answer is no. :)
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I'm going to jump the gun a little bit here and announce the winner of the 2015 polka dat jersey . There's still three primes in the pipeline, but nobody else is going to tie the winning score of two primes.
2015 Mountain Stage Winner:
vmc Primes: 2 Score: 138.64075019173578
Congratualtions vmc!
Cyph3r came in second with 1 prime and a score of 626.0408668936142. I'm not sure about third place yet.
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Congrats vmc and Cyph3r!!
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\o/ vmc
great victory, second winner of SETI.Germany five years after marodeur6
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my current lucky number: 456121176^131072 + 1
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Wow! We have already surpassed the prime score total for any of the previous Tour de Primes! Can we make it to 30,000?
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2015 Mountain Stage Winner:
vmc Primes: 2 Score: 138.64075019173578
Cyph3r came in second with 1 prime and a score of 626.0408668936142. I'm not sure about third place yet.
There's just one prime left in the pipeline, and its score will be smaller than the current third place holder's prime score, so we now have a definitive third place finisher:
tng* with 1 prime and a score of 69.42878773225917.
Congratulations to all three of the top Mountain Stage finishers!
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The mountain stage results are now final. Congratulations to everyone who found a prime!
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With about 60 hours remaining in the Tour de Primes, the race for the yellow jersey (count of primes) couldn't be tighter, with three people having found either 19 or 20 primes each.
The race for the green jersey seems to be in the bag -- unless another mega prime is found. We've already found two mega primes this month. Will a third be discovered?
Click here for 2015 results
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18000+ PPSE and SGS tests and no primes in TDP so far. Less than a day and a half to go. :(
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Dang. Been searching all month and not one prime ;( Last year during TDP I found my first (and only) 2 primary find primes. 1x PPS and 1x PPSE. Suppose my luck ran out for this year..
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275*2^3585539+1 is prime!!! (1079358 digits)
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I have one:
http://www.primegrid.com/workunit.php?wuid=425888439
My first SGS :). | |
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I have one:
http://www.primegrid.com/workunit.php?wuid=425888439
My first SGS :).
Congratulations!
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We're nearly 25% through the month of February, and we're on a pace to set a record highest total prime score for the TDP -- and simultaneously also on a pace to possibly set a record lowest score for the number of primes!
The primes just keeping larger and larger.
February is almost over, and my predictions turned out to be half correct. We've easily set a new record for prime score, besting the old record by nearly 50% with just under 30K total prime score, and more in the pipeline.
We didn't, however, set the record for the lowest number of primes. We currently have 241 (plus a bunch in the pipeline), which is more than we found in 2009 and 2013. We may also exceed exceed 2014's total of 254 if we get a few more primes today.
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Hello and joy!
Just about 7 Hour left, I managed to find a SG-Prime (1885037719017*2^1290000-1) my first of this kind. I did have a couple of Doublechecker back in 2011, the last one (14523422249175*2^666666-1) back in April 8 2011.
My last prime was a pps prime(4775*2^705507+1) from Sept 5. 2011!
So about time I found a new one, don't you agree!!?
Thanks for the tour even finished far , far behind the leading trio, it will be a magic and close photofinish!!
With regards,
Hans Sveen
Oslo, Norway
And going for Gold on SG Prime Search!
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Michael Goetz Volunteer moderator
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Just about 7 Hour left, I managed to find a SG-Prime (1885037719017*2^1290000-1
Congratulations!
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And the winners are...
Although we're waiting for a few more primes to make their way through the full process, they won't change who will win the three jerseys. Here's the 2015 Tour de Primes winners:
Yellow Jersey (most primes): - Scott Brown 22 primes and a prime score of 1998.8741623241906
Green Jersey (prime score): - Randall J. Scalise 20 primes and a prime score of 3914.618194764623
Polka Dot Jersey (mountain stage): - vmc 2 primes and a prime score of 138.64075019173578
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Nice :) Never thought I may win this with just one PC. Good portion of luck though :)
CG Scott and Randall. | |
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Great race this year! Congratulations to vmc and Randall for their jersey wins.
I also think that tng* deserves am honorable mention with 21 primes! Along with Randall, I think they made this one of the best yellow jersey races we have ever seen.
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Indeed, the three of you were neck and neck right to the very end.
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Given the results the last couple of years, I thought it might be a good idea to offer a 4th jersey in addition to the yellow, green, and polka dot ones. Two mega primes were found in the tour this year (by the same user), but that user has no badge to show for it. That is similar to what happened last year I think. I suggest that we consider adding the red jersey (a now defunct Tour de France jersey) to recognize the largest single prime find of the tour. Here is a basic description of the red jersey:
There are a few jersey that are no longer awarded. There used to be a red jersey awarded for the standings in non-stage-finish sprints. This jersey and award was abolished in 1989. The red jersey was determined by adding points which were awarded to the first three riders to pass two or three intermediate locations during the stage. These sprints also scored points towards the green jersey and bonus seconds towards the overall classification, as well as cash prizes offered by the residents of the area where the sprint took place. The sprints still remain in the Tour with the bonus seconds, prizes and points towards the green jersey are still awarded
It comes from source.
I think this new jersey would make sense for the largest prime found (especially given how the red jersey was used to score points towards the green jersey when it was an official part of the Tour de France). It would also encourage people to run more projects possibly. What does everyone think?
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+1
Neo | |
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I think this new jersey would make sense for the largest prime found (especially given how the red jersey was used to score points towards the green jersey when it was an official part of the Tour de France). It would also encourage people to run more projects possibly. What does everyone think?
The situation described would deserve some recognition, agreed.
If someone gets lucky and finds a big one, this would earn both red and green jersey. Is this desirable?
Perhaps we might not need to award red jersey every year and use it when convenient.
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If someone gets lucky and finds a big one, this would earn both red and green jersey. Is this desirable?
Perhaps we might not need to award red jersey every year and use it when convenient.
I was thinking about this after posting, and I lean towards awarding the red jersey each year for the following reasons:
1) We have only had 2 years of the Tour (out of 7 so far) where we did not have someone win more than 1 jersey--2011 and 2015. In 2014, 2013, and 2010, the green and yellow jerseys were won by the same person. In 2012 and 2009, the yellow and polka dot jerseys were won by the same person. Thus, having the occasional red & green combined winner seems like less of an issue to me (also note that, other than perhaps 2010, there would never have been a triple jersey winner if a red had been included).
2) It turns out that more often than not, the green jersey would not have been shared with the red jersey in the Tour thus far. In 2015, 2014, and 2013, the red jersey winner would have won no other badges. In 2012 and 2011, the green winner would also have won the red. In 2010, it is impossible to tell since the list of primes isn't included in the postings, but given that it appears from the total prime scores that nobody found anything but relatively small primes, then the red jersey would have likely gone to the last prime to be found that year (which may or may not have been another jersey winner). In 2009, it appears that the red jersey would not have gone to the green jersey winner (but I might have miscalculated something here as I had to go through some of the primes to see if any larger ones were found than the green winner's largest--individual number prime scores were not included in that list).
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Michael Goetz Volunteer moderator
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Another question, if we decide to start awarding a red jersey, is whether or not we would want to award the red jersey retroactively. We could do so for TDP 2011 through 2014. Before 2011 we don't seem to have a record of the exact primes.
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Before 2011 we don't seem to have a record of the exact primes.
That is true for 2010. In 2009, all but 6 of the found primes are listed under each finder. The six not listed are 3 that were still being GFN tested and 3 that were unreported. Not sure if we could recover it for that year. In either case, the 2009 and 2010 largest primes were relatively small (the green jerseys were won with less than 100 prime score and 150 prime score in each respective year). 2011 was our first tour with really big prime finds, so I would be okay with retroactively applying a red jersey from then going forward.
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I agree with the Red Jersey addition (assuming it would not be that hard for the admins to add it).
Were it to be awarded retroactively, I would get one for 2012, if I'm not mistaken.
To avoid it, I suggest you to consider awarding the red Jersey to the second largest prime if the first also won the green one. Alternatively, the red jersey could be awarded to the largest number of Megaprimes found (regardless of the largest single one).
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676754^262144+1 is prime | |
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Or would I be the one to get 2012? Has Tour always been Feb? I found the mega 121*2^4553899-1 prime in Feb 2012.
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Or would I be the one to get 2012? Has Tour always been Feb? I found the mega 121*2^4553899-1 prime in Feb 2012.
Three mega primes were found during the 2012 Tour:
Usucapio Libertatis BOINC 676754^262144+1 4358.96819037 1528413 Sunday 12th of February 2012 08:33:09 AM
Pooh_Bear_27 121 121*2^4553899-1 3122.46614187 1370863 i7-Eeyore Saturday 25th of February 2012 07:34:08 AM
Lumiukko 27 27*2^3855094-1 1873.22724693 1160501 Snowbreeze_2 Tuesday 28th of February 2012 04:51:22 PM
The numbers following the prime are the prime score and the number of digits. The Tour has always been in Feb. | |
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By the narrowest of margins, 1 prime, Scott Brown has managed to snag the
- Scott Brown
Although Randall J. Scalise found two fewer primes than our yellow jersey winner, he did find much larger primes. With just shy of 4000 points worth of primescore, he has won the green jersey.
- Randall J. Scalise
By the same margin, vmc has managed to pick up the polkadot jersey, for finding most primes during the mountain stage.
- vmc
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PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)
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