mersenneforum.org Factors of M(3326400) - was M(5040)
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 2003-09-16, 14:14 #34 antiroach     Jun 2003 22×61 Posts 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.
 2003-09-16, 14:29 #35 antiroach     Jun 2003 22×61 Posts 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
 2003-09-23, 19:07 #36 wblipp     "William" May 2003 New Haven 2·32·131 Posts 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.
 2003-09-23, 20:09 #37 philmoore     "Phil" Sep 2002 Tracktown, U.S.A. 45D16 Posts 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.
 2003-09-24, 17:22 #38 smh     "Sander" Oct 2002 52.345322,5.52471 29×41 Posts 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
 2003-09-25, 07:45 #39 smh     "Sander" Oct 2002 52.345322,5.52471 22458 Posts And one more: 237059505642536162440801 I've ran 200 curves with B1=50K on M26400 Now back to running 11K curves on M3326400
2003-09-26, 18:26   #40
smh

"Sander"
Oct 2002
52.345322,5.52471

100101001012 Posts

Quote:
 Now back to running 11K curves on M3326400
M3326400 has a factor: 31791659509764001
M3326400 has a factor: 261325800858183601

 2003-09-27, 00:01 #41 antiroach     Jun 2003 22×61 Posts M3326400 has a factor: 5224300236452127601 M3326400 has a factor: 31791659509764001 I guess smh and I found the same factor.
 2003-09-27, 01:37 #42 antiroach     Jun 2003 22·61 Posts 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
 2003-09-28, 17:39 #43 smh     "Sander" Oct 2002 52.345322,5.52471 22458 Posts 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
 2003-09-29, 16:18 #44 smh     "Sander" Oct 2002 52.345322,5.52471 29×41 Posts 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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