Status 5,31[13][+-]

[Wacky]

Just a note to keep everyone informed.

We are making progress!

Because of a number of factors, the least of which being "a real job", the NFSNet effort has somewhat degenerated into a "hard core" of participants.
Two of our contributors are each doing about 1/3 of the sieving. The rest of us make up the other 1/3.

We have completed sieving on 5,311- and 5,311+. We are about 3/4 finished with the estimated sieving on 5,313- and should finish it this week (unless I then find that my estimates were too low). On a couple of my personal machines, I am now starting a survey sieving in 5,313+ in order to better estimate to total requirement. I expect to start switching other sievers to this project at the end of the week. It should take about a month if the preliminary estimates are correct and the level of participation remains unchanged.

My guess is that we will finish sieving on 5,313+ by Thanksgiving. Hopefully Paul will have found time to figure out a reasonable "next" project by that time.

On the "back end":
I have run into a serious "glitch" on by G5 system. I have been getting unreproducible results and other internal errors that indicate that I either have a hardware problem, or have hit some OS constraint that is causing bad results.
None of the other programs that I run seem to have any problems.

On 5,311-, I estimate that we can build a matrix slightly greater than 5M.
However, the above mentioned errors have prevented me from completing that task.

On 5,311+, after transferring the data to another machine, I did succeed in building a matrix that has 4727789 rows, matrix weight of 258403863, and occupies 1.4GB. I project that I will complete the Block Lanczos solution of it on November 30.

Richard

[R.D. Silverman]

Originally Posted by Wacky

Just a note to keep everyone informed.

We are making progress!

Because of a number of factors, the least of which being "a real job", the NFSNet effort has somewhat degenerated into a "hard core" of participants.
Two of our contributors are each doing about 1/3 of the sieving. The rest of us make up the other 1/3.


Richard

Perhaps you might solicit more participants?????

What NFSNET does after it finishes the current batch of base 5 numbers
depends a lot on how much time you want to spend sieving the next number.

3,499+ would be an excellent choice, but it would probably take you 6 months. [or longer ] 2,772+ is slightly easier and 10,229+ is slightly
easier still.

Perhaps I could help out on one of these (and send by data by CD)
rather than work on my own project?

These would all be excellent choices. With somewhat less effort you could
do, e.g. 7,263-.

After I finish 6,281- (sieving finishes this weekend) I will do 2,1550L.
A lot depends on how long I can stay at my current location.

[xilman]

Originally Posted by R.D. Silverman

10,229+ is slightly easier still.

Has some attractions.

Don't think I'd recommend 3,499+ just yet. Too big.

Personally, I don't much mind which is done first, but the aim of completing the entire Cunningham table to 768 bits is a laudable one ...

Paul

[akruppa]

I, too, would help with 3,499+. A big unknown, however, is how much cpu power I will have access to when and if sieving starts. I was supposed to lose access to the university machines by now, but still can log on just fine everywhere. I don't know how long this situation will last.

Alex

[R.D. Silverman]

Originally Posted by akruppa

I, too, would help with 3,499+. A big unknown, however, is how much cpu power I will have access to when and if sieving starts. I was supposed to lose access to the university machines by now, but still can log on just fine everywhere. I don't know how long this situation will last.

Alex

Here is 5,314+ C179 = p88.p91

p88 = 2728963224457842822106715175371794633135479952758694827622631951336401498830595178459933
p91 = 6810147633572883054604965824996241207775348801621422764841104068525109483948789470456241249


6,281- has finished sieving.

[R.D. Silverman]

Originally Posted by R.D. Silverman

Here is 5,314+ C179 = p88.p91

p88 = 2728963224457842822106715175371794633135479952758694827622631951336401498830595178459933
p91 = 6810147633572883054604965824996241207775348801621422764841104068525109483948789470456241249


6,281- has finished sieving.

The linear algebra for 6,281- is about 4 days into a 15 day computation.
I have finished sieving 2,1550L and have started sieving 5,329-.
I do not know if I will be able to complete it. It all depends on when my
office gets moved.

[R.D. Silverman]

Originally Posted by Wacky

Just a note to keep everyone informed.

We are making progress!

Because of a number of factors, the least of which being "a real job", the NFSNet effort has somewhat degenerated into a "hard core" of participants.
Two of our contributors are each doing about 1/3 of the sieving. The rest of us make up the other 1/3.

We have completed sieving on 5,311- and 5,311+. We are about 3/4 finished with the estimated sieving on 5,313- and should finish it this week (unless I then find that my estimates were too low). On a couple of my personal machines, I am now starting a survey sieving in 5,313+ in order to better estimate to total requirement. I expect to start switching other sievers to this project at the end of the week. It should take about a month if the preliminary estimates are correct and the level of participation remains unchanged.

My guess is that we will finish sieving on 5,313+ by Thanksgiving. Hopefully Paul will have found time to figure out a reasonable "next" project by that time.

On the "back end":
I have run into a serious "glitch" on by G5 system. I have been getting unreproducible results and other internal errors that indicate that I either have a hardware problem, or have hit some OS constraint that is causing bad results.
None of the other programs that I run seem to have any problems.

On 5,311-, I estimate that we can build a matrix slightly greater than 5M.
However, the above mentioned errors have prevented me from completing that task.

On 5,311+, after transferring the data to another machine, I did succeed in building a matrix that has 4727789 rows, matrix weight of 258403863, and occupies 1.4GB. I project that I will complete the Block Lanczos solution of it on November 30.

Richard

Any news? Has sieving started on 5,313+? Will you do 5,317-?
What is next? What is the status of the LA for 5,311-?? etc. etc. etc.??

I have lost access to my resources and will be changing my office
shortly. I do not know if I will have any resources in my new location.
So, for the time being, I am going to work on other projects.
I plan on finishing 3^n - 2^n and 3^n + 2^n to n = 400. These
numbers are small and within the reach of the 3 PC's that I have available.

[fatphil]

Originally Posted by R.D. Silverman

I have lost access to my resources and will be changing my office
shortly. I do not know if I will have any resources in my new location.
So, for the time being, I am going to work on other projects.
I plan on finishing 3^n - 2^n and 3^n + 2^n to n = 400. These
numbers are small and within the reach of the 3 PC's that I have available.

Bob - are these Phi_n(3,2) ones all *sieve jobs, or are they still in ECM territory? (Is there a table of candidates/stati?)

Phil

[R.D. Silverman]

Originally Posted by fatphil

Bob - are these Phi_n(3,2) ones all *sieve jobs, or are they still in ECM territory? (Is there a table of candidates/stati?)

Phil

See

http://www.leyland.vispa.com/numth/f.../anbn/main.htm

[fatphil]

Originally Posted by R.D. Silverman

See

http://www.leyland.vispa.com/numth/f.../anbn/main.htm

Where f... = factorization (Paul!) not factorisation, or factors!

Paul - can you verify the file you have there?

$ md5sum /tmp/comps.gz
1177d40e66e1243fd614b9ac36e56739 /tmp/comps.gz

$ gunzip /tmp/comps.gz
gunzip: /tmp/comps.gz: invalid compressed data--crc error
gunzip: /tmp/comps.gz: invalid compressed data--length error

Basically, I've got 2 P3/750s sitting around doing nothing for a few weeks, and if you think that meagre resource can make a useful impact, then I'll join you on a few numbers.

[xilman]

Originally Posted by fatphil

Where f... = factorization (Paul!) not factorisation, or factors!

Paul - can you verify the file you have there?

$ md5sum /tmp/comps.gz
1177d40e66e1243fd614b9ac36e56739 /tmp/comps.gz

$ gunzip /tmp/comps.gz
gunzip: /tmp/comps.gz: invalid compressed data--crc error
gunzip: /tmp/comps.gz: invalid compressed data--length error

Basically, I've got 2 P3/750s sitting around doing nothing for a few weeks, and if you think that meagre resource can make a useful impact, then I'll join you on a few numbers.

Something seems to be wrong with that file, though I know not what.

I'll create an upload a new one. Beware, though, that it will be missing the results that appeared since I left for vacation a couple of weeks ago and haven't yet had chance to process. Many (all?) of those are rather too large to be found easily by ECM so you're unlikely to rediscover new factors but you may waste cycles on numbers already completed.

When the updated tables are available I'll post that fact here.


Paul