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-   -   k=13236795 (https://www.mersenneforum.org/showthread.php?t=6529)

ValerieVonck 2006-10-30 10:37

k=13236795
 
Dears,

This dates from the 15K search
Can anyone verify that this K isn't assigned to anyone?

If not, can I test if further?

Thnx

Cruelty 2006-10-30 13:50

From what I've managed to find you have tested this "k" till n=360000, I don't see anyone else working on it since then :smile:
BTW: there are no reportable primes for this "k"... yet :smile:

ValerieVonck 2006-10-30 14:17

ok then I reserve it! I almost sieved it to 1T :showoff: to 425K

Primes found

[code]
13236795*2^167188 - 1 is prime! 50336 digits
13236795*2^199020 - 1 is prime! 59919 digits
13236795*2^199516 - 1 is prime! 60068 digits <= Reported
13236795*2^215582 - 1 is prime! 64904 digits <= Reported
[/code]

Cruelty 2006-10-30 15:39

Maybe it would be a good idea to merge former 15k reservations / status reporting with RPS' "Choose your own k..."?

VBCurtis 2006-10-31 03:19

I'm still sporadically working on getting the 15k stats page aligned with the "choose your own k" thread and the "report small primes here" threads. Once that project is done, I'll consider going back to the 15k threads/reservations; however, since that subforum is dead, we have to assume anyone who has a reservation that is no longer active on the forum is also no longer searching.

In other words, anyone who wants to work on a 15k reserved from the old days risks duplicating work that an inactive poster has already done.
-Curtis

Kosmaj 2006-10-31 04:42

Among old 15k members it seems that only L58 (Henrik) is still working on his Ks, this year he reported primes for k=587650635 and k=978847155. SlashDude told me that he stopped all his clients. I stopped k=3611911875 at n=400k and k=115029915 at 385k (with gaps done to 403k). I'm still working on k=445419975 (now at 401k).

amphoria 2006-10-31 07:59

I still have k=869688105 nominally reserved, although it is quite some time since I last worked on it. As I have taken it to n=570k it is probably unlikely that I will work on it again as it is a high weight k.

Cruelty 2006-10-31 23:49

Well, I am still working on k=736320585, which is heavy (~145 candidates per every range of n=1000 after sieving till p>10^13). So far I have reached n=500000 :flex:

ValerieVonck 2006-11-26 19:06

FTM, I am 363514 for k, still no primes to report.
Sieved to 885G, (from 363K to 430K), P-1 in progress, elimanting 60+ tests already.

BTW, is this normal (a gap of 150K)?

RegardsC.

Cruelty 2006-11-26 20:25

[QUOTE=CedricVonck;92491]BTW, is this normal (a gap of 150K)?[/QUOTE] Well, for k=736320585 I've had a gap of ~140k, so be patient :smile:

ValerieVonck 2007-01-23 21:57

Still holding strong @ 371496, P-1 continues, sieved to 930G,
I am getting speeds of [b]1430+ kp/sec[/b] with sr2sieve instead of 430 kp/sec with prothsieve sse2.

ValerieVonck 2007-03-10 21:52

Currently @ 375K+
Sieved almost to 1.3T

Ps. can some check the residuals for "correctness"?

Thank you

ValerieVonck 2007-03-31 12:42

Currently @ 379021
Sieved to 1.3T
6505 candidates left to 42500

ValerieVonck 2007-05-09 16:06

Tested to n=383452
Still no new primes to report
Sieving is stopped

Sieving in the range: 424998 - 449998

em99010pepe 2007-05-23 21:06

Cedric,

Can I help you with sieving?

Carlos

ValerieVonck 2007-05-24 04:30

Carlos,

You can help me in sieving the second range > 424000.
The first range is sieved to 1.5T & it takes longer to find a factor (> 500 sec) then to do a llr test.

Contact me again (pm) this evening.

Regards
C.

em99010pepe 2007-05-26 21:02

I splited a range from [URL="http://www.mersenneforum.org/showthread.php?t=6597"]5th RPS Drive[/URL] into several machines so tomorrow I will start sieving for you.

Carlos

ValerieVonck 2007-05-26 22:09

[QUOTE=em99010pepe;107063]I splited a range from [URL="http://www.mersenneforum.org/showthread.php?t=6597"]5th RPS Drive[/URL] into several machines so tomorrow I will start sieving for you.

Carlos[/QUOTE]

No problem!

em99010pepe 2007-05-27 15:49

Started sieving with only one machine. Sieve speed is at 5M/sec so that's 432G per day. How far do you want me to go?

Carlos

ValerieVonck 2007-05-27 17:19

Carlos,

As I said, you can go as far as you want.
My guesstimate for optimal sieveing is 2T.

Regards
C.

em99010pepe 2007-05-29 13:07

Cedric,

Please prepare the next range to sieve. Thank you.

Carlos

ValerieVonck 2007-05-29 16:04

Carlos,

My original file contains 4000 cadidates.
I don't know how far sieved, but you can go to 20T or more.

I will prepare another range from 449998 to 1M

Regards
C.;

em99010pepe 2007-05-29 16:16

Mine has 3805, sieve up to 1.2T but a factor is found every 1700 sec.
20T?????? I was thinking to stop at 2T.

Carlos

VBCurtis 2007-05-29 19:40

Stop sieving when the factor removal rate is equal to the time to run an LLR test on a median candidate in the range.

For a small range like 425-450, candidates take roughly the same time to LLR, so run LLR on a single candidate and sieve until removal rate is equal to that time.

It's very inefficient to sieve small ranges; 1.2T is certainly plenty for the 425-450 range.

Carlos, if you have spare sieving resources, I have months of sieving work to do using sr2sieve. I'm sieving 11,13,31,45,99,127 all from 1M to 4M (except 11, which is already LLRed to 1.5M). This sieve will need to run to roughly 80T before LLR should begin, and I'm at 20T. If you'd like to do a T or so as a public service, I'd love it.

-Curtis

em99010pepe 2007-05-29 20:28

Cedric,

I stopped sieving.

Curtis,

You got a private message. Yes, I'll do 1T or 2T or even more....I like to sieve....

Carlos

Flatlander 2007-05-29 21:24

[quote=VBCurtis;107266]
...
Carlos, if you have spare sieving resources, I have months of sieving work to do using sr2sieve. I'm sieving 11,13,31,45,99,127 all from 1M to 4M (except 11, which is already LLRed to 1.5M). This sieve will need to run to roughly 80T before LLR should begin, and I'm at 20T. If you'd like to do a T or so as a public service, I'd love it.

-Curtis[/quote]
How long does it take to sieve a T? On what CPU?

VBCurtis 2007-05-30 02:37

[QUOTE=Flatlander;107278]How long does it take to sieve a T? On what CPU?[/QUOTE]

I have two data points:
TurionX2-1600, 600kp/sec using 32bit sieve.
Conroe-1950, 1500 kp/sec using 64bit sieve.
(per core for each)

I think that means the conroe does 1T/week/core, while the X2 takes 2.5 weeks/T/core.

I am happy to share the files for team LLRing once they are ready, if any of you potential sievers are interested. 13 and 11 are fairly low-weight, but 45 is very high-weight (higher than 15, I think). I want to LLR 99 on my own, and 31 is for Steven (as shown on k<300 page).

Also: if any of you are interested in testing a k from 1M to 4M, we can add it to this sieve and work together. You'd have to sieve it alone up to 20T to catch up to me, but adding another k to the sieve would not slow it down much.

Carlos-- I'll build an updated sr2data file and email it tomorrow.
-Curtis

ValerieVonck 2007-05-30 16:44

Carlos,

Thank you for your sieving ... I will check my gmail account.

Regards
C.

ValerieVonck 2007-06-05 11:53

Search still going on...

ValerieVonck 2007-07-09 16:06

Currently @ 402728 - No primes to report.

ValerieVonck 2007-07-28 09:34

Currently @ 411901 - No new primes to report

ValerieVonck 2007-09-06 16:05

Tested to 424998 -
Results available @ [url]http://users.skynet.be/bk261068/lresults.txt[/url]

Will continue to 450.00 (will decide later on to go further)

ValerieVonck 2007-10-29 10:19

Tested to 438384 still no new prime to report :sad:

ValerieVonck 2007-11-24 23:31

Range 425k to 450k completed
Results available @ [url]http://users.skynet.be/bk261068/lresults_13236795_450K.zip[/url]

Sieving in progress in the range 450k - 1M

ValerieVonck 2007-12-26 10:04

K 13236795 from 450k to 1M => sieving in progress.

ValerieVonck 2008-02-11 10:56

Still crunching.
Sieve @ 3.1T ... eliminating a candidate each 140 seconds
79k candidates remaining.

ValerieVonck 2008-09-12 11:49

Sieved till 8.5T
LLR testing will commence shortly in the range 445k => 1M

ValerieVonck 2008-12-10 22:03

sieved to 15T

LLR testing is busy in the rang 445k - 1M

ValerieVonck 2008-12-21 10:39

Tested to 465798, sieved to 15T.
75k candidates to go to 1M

ValerieVonck 2009-01-12 22:08

13236795*2^485854-1 is prime!

Submitted @ prime pages @ l695

Sieved till 15T / 70k candidates till n=1M

Kosmaj 2009-01-13 00:09

[B]Cedric[/B]

Congrats on a nice prime!

ValerieVonck 2009-01-13 05:36

Thank you!!
I will keep searching, certainely until n=1M

ValerieVonck 2009-06-08 20:55

13236795*2^512891-1 is prime!

ValerieVonck 2009-09-21 06:05

13236795 · 2^559033-1 is prime!

ValerieVonck 2010-02-12 23:07

13236795*2^600493-1 is prime!

Kosmaj 2010-02-13 01:14

Hi Cedric, congrats on a nice prime!

ValerieVonck 2010-02-13 11:20

Thx man. I will keep testing this number :smile: Shortly I will recommence the sieve ... it takes 10 minutes to test a number...

Regards
C

ValerieVonck 2010-03-10 07:17

13236795*2^609210-1 is prime!

ValerieVonck 2010-11-23 18:23

currently standing @ 701361

ValerieVonck 2011-05-29 20:14

going strong @ 785514, no more primes found :s

ValerieVonck 2011-08-06 10:28

currently @ 817162 - no further progress

ValerieVonck 2011-09-19 17:53

13236795*2^835133-1 (probable prime under verification) finally :) yes!

ValerieVonck 2011-09-19 18:43

prime is proven @http://primes.utm.edu/primes/page.php?id=102081

ValerieVonck 2012-03-26 17:20

13236795*2^900284-1 is prime! (under verification)

ValerieVonck 2012-03-26 18:58

13236795*2^900284-1 is proven prime! [url]http://primes.utm.edu/primes/page.php?id=105860[/url]

Kosmaj 2012-03-27 08:59

Hi Cedric

Congrats on yet another nice prime, and thanks for staying with us all these years! I just checked, the first post of this thread was posted on Oct. 30, 2006. :smile:

ValerieVonck 2012-03-27 10:57

@kosmaj, thx for the nice reply :)
When I take responsibility, I own up to it :)
And doing this project (off & on) I have learned much about myself
- planning
- responsibility
- patience

I'll keep on crunching for a while (first big milestone) up until 1M
Then I plan a hiatus, then I will restart the sieve for 1M to 50M

Best regards
C

ValerieVonck 2012-10-29 16:07

llr testing till 1M completed, no more new primes to report
sieving is started in the 1M -> 50M range
lresults will be uploaded soon

ValerieVonck 2012-11-01 10:16

Results available @ [URL="http://users.skynet.be/bk261826/lresults.txt"]http://users.skynet.be/bk261068/lresults.txt[/URL]

Kosmaj 2012-11-01 22:19

Hi Cedric

I cannot access that page:
[I]The server encountered an error while processing your request
Request: [url]http://users.skynet.be/bk261826/lresults.txt[/url]
Response: The page you are looking for could not be found [/I]

ValerieVonck 2012-11-02 01:20

[QUOTE=Kosmaj;316686]Hi Cedric

I cannot access that page:
[I]The server encountered an error while processing your request
Request: [url]http://users.skynet.be/bk261826/lresults.txt[/url]
Response: The page you are looking for could not be found [/I][/QUOTE]

oops it should be
[url]http://users.skynet.be/bk261068/lresults.txt[/url]

I wasn't awake yet ;)

Kosmaj 2012-11-02 06:25

Thanks, now it works!

ValerieVonck 2013-04-19 07:24

on the 27th of April, the candidates from 1M to 50M will be sieved to 25T.

Does anybody have an idea how to sieve the same file on different pc's??

Thank you

Thomas11 2013-04-19 08:51

[QUOTE=CedricVonck;337574]
Does anybody have an idea how to sieve the same file on different pc's??
[/QUOTE]

It depends on your sieving software:

If you are using [URL="https://sites.google.com/site/geoffreywalterreynolds/programs/sr1sieve"]sr1sieve[/URL], you can run different intervals [pmin-pmax] on the individual machines. All you have to do is to collect the factors found (using the "-f" switch).
For example:

[CODE]./sr1sieve -i input.txt -o output.txt -f factors.txt -p 1000000 -P 2000000[/CODE]

After a while you transfer the factors files to your master machine and update the sieve file using srfile, which is part of [URL="https://sites.google.com/site/geoffreywalterreynolds/programs/srsieve"]srsieve[/URL]:

[CODE]./srfile -g --known-factors factors.txt sievefile.txt[/CODE]

(The "-g" switch is to force the NewPGen file format.)


There might also be a similar procedure for NewPGen, but I haven't tried yet...

kar_bon 2013-04-19 11:02

[QUOTE=Thomas11;337575]There might also be a similar procedure for NewPGen, but I haven't tried yet...[/QUOTE]

NewPGen -> Services -> Sieve across several machines -> Duplicates
fill in
- the sievefile-name (npg-format)
- number of machines/files you need
- range of primes to sieve

It will create several files in npg-format with different p-startingpoints in the header.

After sieving you can combine all result-files with
NewPGen -> Services -> Sieve across several machines -> Merge.

VBCurtis 2013-04-19 23:04

newpgen is so slow for a single k compared to sr1sieve that Cedric must be using sr1sieve, right??

ValerieVonck 2013-04-26 16:28

Hey guys, thank you very much for the replys.
I am currently working on Mac, so no newpgn for me.
I am using sr1sieve 1.4.5...

I will see what it gives ;)

Now for a round of P-1 :)

ValerieVonck 2014-01-02 10:34

Range 1M -> 50M sieved to 60T, continuing to 100T

ValerieVonck 2014-01-30 09:01

Sieved to 65T (+/-)

regards,

ValerieVonck 2015-05-18 12:45

Range 1M -> 50M sieved to 115T+, continuing to 200T

ValerieVonck 2015-10-13 08:19

Sieving in progress for 1M-50M in the 150T - 200T
Eta: March 2016

ValerieVonck 2016-04-04 12:16

Progress update: range 150t -> 200t almost complete (range 1M -> 50M)
Due date: 11/4/16

Will restart llr'ing in the range: 1.0 M -> 1.1 M

ValerieVonck 2016-04-11 19:30

Started llr'ing the first batch of 1000 tests (will take about 4,3 days)
Will go for 10.000 tests in the first try (take about 4 à 5 months) with the latest version of llr

Anyone know how to llr on 4 cpu's?
Will be appreciated!

Best regards,
Valerie

paulunderwood 2016-04-11 19:54

[QUOTE=ValerieVonck;431334]

Anyone know how to llr on 4 cpu's?
Will be appreciated!
[/QUOTE]

Multi-threaded LLR does not exist yet, but you could use mprime/Prime95 for that to PRP.

You could set up your own prpnet server using rogue's software for this, and attach clients locally.

Alternatively, create 4 directories and put an LLR64.exe/llr64 in each directory with a sub-list of candidates to be tested. :smile:

ValerieVonck 2016-04-12 13:10

[QUOTE=paulunderwood;431338]Multi-threaded LLR does not exist yet, but you could use mprime/Prime95 for that to PRP.

You could set up your own prpnet server using rogue's software for this, and attach clients locally.

Alternatively, create 4 directories and put an LLR64.exe/llr64 in each directory with a sub-list of candidates to be tested. :smile:[/QUOTE]

Thank you!
I thought something like this ;)

ValerieVonck 2016-05-22 13:33

Starting Lucas Lehmer Riesel prime test of 13236795*2^1051978-1
Using zero-padded FMA3 FFT length 112K, Pass1=448, Pass2=256
13236795*2^1051978-1 is prime! (316685 decimal digits) Time : 447.419 sec.

Will submit asap on the prime pages

Ps. Primepages reports it as too small to credit :(

pinhodecarlos 2016-05-22 13:51

Minimum is 388341 decimal digits.

ValerieVonck 2016-06-06 16:17

2 more primes (too small for prime pages)

[CODE]
13236795*2^1066721-1
13236795*2^1067293-1
[/CODE]

ValerieVonck 2017-01-29 14:09

2 more primes found: (too small for primepages)

[code]
13236795*2^1176214-1 is prime! (354083 decimal digits)
13236795*2^1196191-1 is prime! (360097 decimal digits)
[/code]

ValerieVonck 2017-12-16 10:14

1 Attachment(s)
Range 1.2M -> 1.3M complete, no new primes found
Attaching the result files for the range 1.0M -> 1.3M

ValerieVonck 2018-02-19 17:24

Sieving in progress, till 230T, ETA 20/3
Will then continue llr testing in the range 1.3M -> 1.4M

ValerieVonck 2018-05-26 08:29

Sieving in Progress to 250T, eta 03/07
(ftm, a factor is found every +/- 360 sec)

ValerieVonck 2018-06-04 14:47

Yesterday, my mac crashed and had to restart sieving from a copy of my input file as of February,

Currently at 216T, eta for reaching 250T is October :no:

Lesson learned: take a more frequent backup

Apologies to the community
Kind regards,
Valerie

pepi37 2018-06-04 17:22

[QUOTE=ValerieVonck;489142]Yesterday, my mac crashed and had to restart sieving from a copy of my input file as of February,

Currently at 216T, eta for reaching 250T is October :no:

Lesson learned: take a more frequent backup

Apologies to the community
Kind regards,
Valerie[/QUOTE]
Why you make sieving ? We can collect you sieve , send to YOYO and it will be over in ten days at depth you will never reach by yourself.

ValerieVonck 2018-06-05 10:51

[QUOTE=pepi37;489157]Why you make sieving ? We can collect you sieve , send to YOYO and it will be over in ten days at depth you will never reach by yourself.[/QUOTE]

Dear,

This number I am crunching for a long time on my own...
Thank you for your recommendation, but I have to politely decline your offer

Kind regards,
Valerie


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