5*2^n-1 Reservation Thread

[VBCurtis]

This is a new thread to coordinate efforts testing k=5.
Please post your reservations below and mail your LLR results to Curtis upon complition of your file.

Found Primes (by this project)
5*2^1194164-1 (359480 digits) by AES, on Jan. 20, 2008.
5*2^3090860-1 (930443 digits) by VBCurtis, on Apr. 11, 2012.
5*2^3264650-1 (982759 digits) by Carlos, on July 8, 2013.
5*2^5429494-1 (1634442 digits) by unconnected, on Jan. 13, 2017.
5*2^7037188-1 (2118406 digits) by ryanp on Sep. 22, 2021
5*2^7755002-1 (2334489 digits) by ryanp on Sep. 22, 2021
5*2^10349000-1 (3115361 digits) by ryanp on Sep. 29, 2021
5*2^10495620-1 (3159498 digits) by ryanp on Sep. 26, 2021
5*2^11355764-1 (3418427 digits) by ryanp on Oct. 2, 2021

Status

      Range         Tested by     Status
  470,000-3,499,000 - RPS         - Complete (3 primes)
3,499,000-3,646,000 - pb386       - Complete (Prime: 5*2^3569154-1)
3,646,000-4,000,000 - Carlos      - Complete
4,000,000-4,010,000 - Kosmaj      - Complete
4,010,000-4,090,000 - Carlos      - Complete
4,090,000-4,100,000 - Kosmaj      - Complete
4,100,000-4,750,000 - Carlos      - Complete
4,750,000-5,040,000 - Carlos      - Complete
5,040,000-5,090,000 - kracker     - Complete
5,090,000-5,150,000 - Carlos      - Complete
5,150,000-5,160,000 - Carlos      - Complete
5,160,000-5,175,000 - Carlos      - Complete
5,175,000-5,185,000 - Carlos      - Complete
5,185,000-5,200,000 - Carlos      - Complete
5,200,000-5,250,000 - Carlos      - Complete
5,250,000-5,300,000 - Curtis      - Complete
5,300,000-5,400,000 - Thomas      - Complete
5,400,000-6,000,000 - unconnected - Complete (prime: 5*2^5429494-1)
6,000,000-10,000,000 - ryanp      - Complete (2 primes: 5*2^7037188-1, 5*2^7755002-1)
10,000,000-12,000,000 - ryanp     - Complete (3 primes: 5*2^10349000-1, 5*2^10495620-1, 5*2^11355764-1)

Note: Primes found by pb386 were not a part of this project.

The latest test file
The attached file contains all candidates in the 4-6M range, including already tested ones.
Please help yourself by extracting the range you want to test.
Extensively sieved by Psieve (final sieve file of June 22, 2014).

[gd_barnes]

Originally Posted by VBCurtis

Sieving is complete to 25T so far.
470-500k has been reserved and sent to Gary for processing.
Since I don't have mod privileges, and don't want to stick Kosmaj or Larry with administering yet another reservation thread, I'll ask anyone interested in work to "reserve" the range in this thread. At the same time, pm me your email, and I'll send the file.

For now, I'll work in 20k or 30k chunks. 500-520/530 will be ready in a few days. Anyone want it? 470-500 contained 1400 candidates.

-Curtis

If there are no takers, I'll take up to n=520K/530K; however you divide it up. I'll put 2 cores on it. At an avg. of 400 secs./candidate at n=500K, 2800 candidates from n=470K-530K would take 6.5 days.

Technically it should take even less time. A test around n=470K showed a smaller fftlen and only took about 300 secs. I'm not sure how long the fftlen stays less though.

I wish my BIG k's LLR'd this fast!


Gary

[PatrickSchmeer]

Originally Posted by VBCurtis

For now, I'll work in 20k or 30k chunks. 500-520/530 will be ready in a few days. Anyone want it? 470-500 contained 1400 candidates.

I have just returned from a short trip. Yes, I would like to reserve 500-530.

Patrick

[gd_barnes]

Originally Posted by PatrickSchmeer

I have just returned from a short trip. Yes, I would like to reserve 500-530.

Patrick

Curtis, it works for me that Patrick takes 500-530. I'll reserve a different range after 470-500 is done LLRing...probably on Sunday; or just simply wait until you tell us what the next range will be after 530.

The fftlen went up around n=476.1K. It's at about 380 secs/candidate where I'm at now (n=480K) gradually increasing to right around 400 secs. at n=500K on a 3.2 Ghz P4.


Gary

[VBCurtis]

Patrick- glad you're interested. pm me your email address, I'll send the 500-530 file when it's ready, likely Monday evening-overnight.

Since multiple people are interested in supplying LLR work, I set a second core on sieving; I should be able to provide a 25k chunk every 5-6 days this way. I suppose I can also suspend my fanatic over-sieving of ranges; the 500-530 chunk will be sieved to nearly 30T as it is.

Gary, I'll send you 530-550 roughly next friday, around 33T on the sieve. Since the FFT length just jumped at 480, this range should be pretty close to optimally sieved at that level. I think there will be another jump around 550-575, so I'll run the sieve quite a bit deeper before releasing 550-600.

-Curtis

[gd_barnes]

Originally Posted by VBCurtis

Since multiple people are interested in supplying LLR work, I set a second core on sieving; I should be able to provide a 25k chunk every 5-6 days this way. I suppose I can also suspend my fanatic over-sieving of ranges; the 500-530 chunk will be sieved to nearly 30T as it is.

Oh, NOW the truth comes out! I just KNEW you were over-sieving! (Although for the huge range of n=470K-4M that you're sieving, I can't really tell.) Great work! With your sieving, LLRing on k=470K-500K is just smoking...at n=483K this morning...running on 2 cores after about 30-35 hours. With the fftlen jump at n=476K, it was about half at the faster rate and half at the slower rate at this point.

I'll be out of town from tonight until Sunday and my k=5 machine may just end up sitting idle for a good portion of Sunday without a concerted effort to switch LLRing between machines, which I don't want to mess with. Darn the idle CPU cycles!

Gary, I'll send you 530-550 roughly next friday, around 33T on the sieve. Since the FFT length just jumped at 480, this range should be pretty close to optimally sieved at that level. I think there will be another jump around 550-575, so I'll run the sieve quite a bit deeper before releasing 550-600.

-Curtis

Great! Works for me on 530-550.

I'll run some quickie tests to see where the fftlen jumps again. No use to over-sieve more than you have to!

Final note to all...I still plan on splitting any first prime that I find on this with BlisteringSheep, who has contributed a lot of sieving to many efforts at RPS without being able to LLR them.


Gary

[gd_barnes]

k=5
470-500 complete
no primes found

Curtis, I'll take 530-550 when you have it ready.

[VBCurtis]

500 to 525 and 525 to 550 sent to Patrick and Gary, respectively.
550 to 575 and 575 to 600 will be ready roughly 22 Oct, sieved to 35T. To claim either one, post here and PM me your email address if I don't already have it.

-Curtis

[PatrickSchmeer]

I'll take 550-575.

[Kosmaj]

I'd like to reserve the next file, 575-600, for B'maxx, he has only 2 cpu's now, and will appreciate such fast testing numbers.

I suppose I can also suspend my fanatic over-sieving of ranges; the 500-530 chunk will be sieved to nearly 30T as it is.

I agree. IMO you can release files all the way to 633k right now.

[gd_barnes]

I probably started a trend here that was not a good idea so I'll take the blame for it. Since there's no formal posted sieved files like on the various RPS drives...beginning with n=600K, it would be a good idea to wait until we're done LLRing any one 25K range (or whatever range Curtis decides to release larger ones in the future) before reserving the next range.

If not, then I reserve n=600K-625K, 625K-650K, 650K-675K, on up to 4M.

Seriously...on another note...I don't know if everyone may be aware of it, but I think Curtis will want to take the range of n=600K-632K for himself for a specific goal that he has. I just wanted to make sure there are no stepped-on toes, Curtis, if someone wants to reserve above n=600K in the near future.


Gary