Reserved for MF - Sequence 4788

[yoyo]

Originally Posted by fivemack

You have done two orders of magnitude more work than would be involved in simply doing the sieving! A C129 is an 80-hour job, a single curve at 260M takes half an hour and you've done more than ten thousand of them - this ECM barrage is comparable to the sieving effort required for a C160.

Where can I see which amount of curves on which B1 level should be done before sieving?

yoyo

[wblipp]

Originally Posted by yoyo

Where can I see which amount of curves on which B1 level should be done before sieving?

For GNFS, sieve to 1/3 of the composite size. For a C129 that would be 43 digits. To see how many curves that takes, run ecm with -v option. With B1=11e6, 40 digits is 681 curves and 45 digits is 4480 curves. Interpolating gives 2960 curves, so about 3000 at 11e6 is enough. Two or three times this might be justified on the basis of convenience.

[yoyo]

Originally Posted by debrouxl

I hoped to find the sigma through http://www.rechenkraft.net/yoyo/down...oad/stats/ecm/ , but there doesn't seem to be a folder for Aliquot sequences...

Now there is a as folder with the result and the sigma:
http://www.rechenkraft.net/yoyo/down...88_i2915_17540

yoyo

[Batalov]

Originally Posted by wreck

It seems like the yoyo@home have found a p58 of the c129 with B1=85e7, and is it possible to show the sigma of the factor on the table please?

The era of NFS misses has come! There are now entirely too many p65s for c172-s, p58 for c176-s... then why not a p58 for the c129.

[akruppa]

2k@11M on the c138.

[Andi47]

2400@11e6 on the c138, no factor

[rajula]

The c138 has been factored as p66 * p73 (not by me... I wonder if it was also done with ecm ).

The current status is i2920 with a c136.

[RobertS]

Originally Posted by rajula

The c138 has been factored as p66 * p73 (not by me... I wonder if it was also done with ecm ).

Nope, I did it by NFS. A first try of such size on my I7.

[jrk]

Now we have a c153 on line 2924.

So far I have done 600 ECM curves @ B1=8e7, B2=9.7e11

And there is this polynomial:

# sieve with ggnfs lasieve4 I14e on alg side from Q=5M to 33M
# est ~55M raw relations (avg. 0.061 sec/rel C2D @ 3.4GHz)
# aq4788:2924
n: 112296381884896012490614382451451986588162409728169933283326536718943569566088868056285056843610277229580864777319128827749822341401205107820881104153761
# norm 1.007367e-14 alpha -5.944168 e 4.262e-12 rroots 5
skew: 581194.32
c0:  105458850334534013736584980745623680
c1:  261196250419483240838309407992
c2: -1631204900348006739703582
c3: -2536445228874907803
c4:  6724024379652
c5:  856596
Y0: -167308382383766648362675345607
Y1:  59894083073807711
rlim: 20000000
alim: 20000000
lpbr: 29
lpba: 29
mfbr: 58
mfba: 58
rlambda: 2.5
alambda: 2.5

I tested six polynomials with murphy score from 4.209e-12 to 4.472e-12 and the above polynomial had the best yield.

[Gimarel]

I am already sieving with this poly:

# norm 1.179679e-14 alpha -7.474522 e 4.832e-12 rroots 5
skew: 4546142.80
c0: -6064723996191997325826878478448793241
c1: 36018107245891279042997152353345
c2: -8649683750492276196117189
c3: -5758528824171653297
c4: 305864195158
c5: 64680
Y0: -280490396538732147442124580146
Y1: 788153256539269661

I expect to have the factors on sunday.

[Prime95]

Congrats!!! May your down driver last longer than the last ones did!