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Old 2003-09-16, 14:14   #34
antiroach
 
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oh and about the primo thing. I used an older version 2.0.1 or something like that. When i upgraded to a newer version 2.1.2(i think) it worked correctly with the larger number.
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Old 2003-09-16, 14:29   #35
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yay this weekend proved to be successful for me :). Eventhough I was away in Boston for all of it, I left my computer running the ecmclient 24/7. As a result of this I've 3 new factors for this project. The first factor found is a factor of 2^2016+1, so it is a factor of M(4032). The Mersfmt form is:

M( 4032 )C: 967287298662167339558077202115073

This composite has been reduced from C342
to C309.


The 2nd factor/s found were for 2^1750 +1.

M( 3520 )C: 876842301273103818127810927797272474881

The other factor is a P347.

the 3rd factor found was for 2^7392 + 1.

M( 14784 )C: 507649231049494939716780475777

I guess wblipp submitted all this info to will edington which is good because that way my box can process more curves instead of having it waste cycles on writing emails to will :O
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Old 2003-09-23, 19:07   #36
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Default Forty New Factors!

FORTY NEW FACTORS!

Following philmoore and smh's suggestions, the ElevenSmooth project has just completed using Prime95 for ECM work on M(3326400) with B1=2000. Previously ElevenSmooth had found 51 factors of M(3326400). This was the first ECM work for most of the algebraic factors that are multiples of 25. Eight of the factors were found only with P-1.

Soon we will try B1=11000, using an updated lowM.txt.

Congratulations to the whole ElevenSmooth team!

M( 52800 )C: 1110456547201
M( 7700 )C: 117083251785600101
M( 207900 )C: 121624256130301
M( 29700 )C: 135696062701
M( 184800 )C: 14740756801
M( 166320 )C: 1486389532321
M( 184800 )C: 155232040264963201
M( 369600)C: 16360713601
M( 7700)C: 17848478870663941501
M( 415800 )C: 180505349640001
M( 207900 )C: 1849166608627801
M( 237600 )C: 230490559874995201
M( 12600 )C: 278859117601
M( 369600 )C: 28511367446862115201
M( 23100 )C: 2876284395784801
M( 25200 )C: 3095247909601
M( 5400 )C: 315248733310240801
M( 123200 )C: 31958268763439410022401
M( 207900 )C: 32294978101
M( 46200 )C: 33116252401
M( 46200 )C: 3451980747601
M( 14850 )C: 35702634760651
M( 138600 )C: 36867122661601
M( 29700 )C: 3762777764453401
M( 554400 )C: 37996737609601
M( 33600 )C: 390401356801
M( 29700 )C: 39333105901
M( 100800 )C: 409044787201
M( 207900 )C: 4219578316801
M( 10800 )C: 4505385103509601
M( 138600 )C: 4885781670001
M( 8800 )C: 499242220840001
M( 332640 )C: 5046416907841
M( 46200 )C: 59147642401
M( 79200 )C: 680251266604801
M( 52800 )C: 7537788987379201
M( 23100 )C: 838159346201101
M( 9450 )C: 8866953604328401
M( 79200 )C: 88936898054401
M( 26400 )C: 994971331201

Will Edgington has been informed, so many of these will show up in the next release of lowM.txt. The published file doesn't include exponents above 200,000, but Will keeps a data base for much higher levels.
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Old 2003-09-23, 20:09   #37
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Congratulations! That is an impressive list of factors. I have been on vacation and see that you posted some questions while I was gone, but it looks like you must have gotten most of them answered. By the way, I just finished doing some factoring on MM28 and MM30 and found that up to about 15 digits, I was finding factors faster with P-1 than ECM, but as factors get larger than this, ECM starts to be more effective.
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Old 2003-09-24, 17:22   #38
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This afternoon, before getting the new lowm.txt i found the following new factor:

403655909515584001

BTW, i ran P-1 with B1=100K and B2=25M but didn't find any new factors.

EDIT: I just found another factor:

241967783549391442012801


Last fiddled with by smh on 2003-09-24 at 17:43
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Old 2003-09-25, 07:45   #39
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And one more:

237059505642536162440801

I've ran 200 curves with B1=50K on M26400

Now back to running 11K curves on M3326400
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Old 2003-09-26, 18:26   #40
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Quote:
Now back to running 11K curves on M3326400
M3326400 has a factor: 31791659509764001
M3326400 has a factor: 261325800858183601
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Old 2003-09-27, 00:01   #41
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M3326400 has a factor: 5224300236452127601
M3326400 has a factor: 31791659509764001

I guess smh and I found the same factor.
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Old 2003-09-27, 01:37   #42
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yay found another

M3326400 has a factor: 403655909515584001

Doh, smh already found this factor too.

Last fiddled with by antiroach on 2003-09-27 at 01:39
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Old 2003-09-28, 17:39   #43
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Antiroach, this time you beat me:

ECM found a factor in curve #7, stage #2
Sigma=5988491106070917, B1=11000, B2=1359460.
M3326400 has a factor: 5224300236452127601
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Old 2003-09-29, 16:18   #44
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ECM found a factor in curve #6, stage #2
Sigma=699409514738096, B1=11000, B2=1359460.
M3326400 has a factor: 631992368796054190952293730756927251

631992368796054190952293730756927251 is composite, and it's factors are:

PRIME FACTOR 31791659509764001
PRIME FACTOR 19879187766274163251

The first was known, the second not yet

EDIT: never mind, just read my e-mail, and the second was also found before

Last fiddled with by smh on 2003-09-29 at 16:20
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