2^859-1 sieving

[xilman]

Originally Posted by FactorEyes

What's the deal with uppercase in reln files, anyway. I mean, is the siever trying to tell us that some primes are WAY TOO IMPORTANT for lowercase?

And airplane food: What's the deal with airplane food? Don't they feed the jets enough when they're on the ground?

I've always wondered about people who think that using vacuum cleaners is worth the effort.

Paul

[mklasson]

Originally Posted by xilman

I've always wondered about people who think that using vacuum cleaners is worth the effort.

Some people are very particular about their empty spaces and want them more than averagely clean.

[ValerieVonck]

Hi!

Does anybody know into which numbers this composite (and other ones) splits?

Thank you!

[Mini-Geek]

Originally Posted by CedricVonck

Hi!

Does anybody know into which numbers this composite (and other ones) splits?

Thank you!

This database contains information on factors of numbers and certain types of sequences:
http://factorization.ath.cx/
Here's its entry on this number:
http://factorization.ath.cx/search.php?query=M859

[J.F.]

I ran into the badsched bug...
Note the drop in yield for 67.5M to 68M:

A00670a: total yield: 72908, q=67050043 (0.70423 sec/rel)
A00670b: total yield: 74765, q=67100009 (0.62354 sec/rel)
A00671a: total yield: 72979, q=67150001 (0.62131 sec/rel)
A00671b: total yield: 74502, q=67200011 (0.71199 sec/rel)
A00672a: total yield: 76703, q=67250021 (0.62796 sec/rel)
A00672b: total yield: 75435, q=67300027 (0.70644 sec/rel)
A00673a: total yield: 76052, q=67350029 (0.62942 sec/rel)
A00673b: total yield: 76986, q=67400009 (0.71050 sec/rel)
A00674a: total yield: 76340, q=67450013 (0.62818 sec/rel)
A00674b: total yield: 76363, q=67500007 (0.70336 sec/rel)
A00675a: total yield: 71028, q=67550009 (0.62990 sec/rel)
A00675b: total yield: 72257, q=67600003 (0.71044 sec/rel)
A00676a: total yield: 2086, q=67650043 (5.48700 sec/rel)
A00676b: total yield: 0, q=67700011 (inf sec/rel)
A00677a: total yield: 14293, q=67750021 (1.23527 sec/rel)
A00677b: total yield: 12991, q=67800001 (1.24436 sec/rel)
A00678a: total yield: 35928, q=67850011 (0.77824 sec/rel)
A00678b: total yield: 36948, q=67900003 (0.75815 sec/rel)
A00679a: total yield: 62312, q=67950013 (0.63421 sec/rel)
A00679b: total yield: 60444, q=68000003 (0.63617 sec/rel)

Got myself the new binary from here, it seems to work perfectly. I did A67.5-68 again and put those relations in a separate file.

Total time estimation: 10.3M sec. This is from summing completion times of dualcore jobs. Actual time should therefore be doubled, I guess. Even better: subtract a few percent, because when one core finishes its 50K range, it remains idle until the other core finishes.

[fivemack]

I've been a bit slow at keeping this updated; had quite a full weekend.

We're two-thirds of the way through the sieving; can I inspire people to a swift race to the finish-line and beyond?

[bsquared]

I'll take 48M-54M both sides.

[antiroach]

I've got 2 machines free and I can contribute to the sieving for a couple of weeks. Can someone provide the command that needs to be ran to sieve this number? Thanks.

[bsquared]

Assuming you have the ggnfs binaries (if not, you can get them from here), create a poly file, say 2-859.poly and copy the [code] stuff from the first post into it. reserve a range (2 cpus for 2 weeks could probably do 1M both sides; 91M is open ...). then get into a command prompt (windows or linux shell) and type:

gnfs-lasieve4I15e -r 2-859.poly -f 91000000 -c 1000000 -o 91M-92M-rat.dat

then get into another command prompt (or use & after the previous command if you're in a linux environment) and do the same command but use -a 2-859.poly instead and use a different output file name like -o 91M-92M-alg.dat. The -r and -a flags instruct ggnfs to sieve special-q on the rational vs the algebraic side.

-c controls how many special-q to do. If you need to shut down your PC, I believe the new binaries have a resume option, else, there are other ways to determine manually where it left off.

Is that enough to get you started?

[antiroach]

Thanks bsquared! Thats perfect. I'll take 91M - 92M a+r.

[bsquared]

Taking 96M-100M.