fond of a factor? Urn yourself to become remains - Page 9

markr · 2011-01-27, 14:41

M2909701 has a factor: 34116886410693051247
k = 3 * 41^2 * 1913 * 607697

M2909749 has a factor: 165757446506320718519
k = 7 * 2417 * 7477 * 225157

M2909827 has a factor: 17618623784616481399
k = 3^3 * 257 * 281 * 1552643

All in P-1 stage #2, B1=105000, B2=2283750, E=6.
I keep thinking I should reduce the bounds...

alpertron · 2011-01-27, 16:53

After running 220 ECM curves with B1=50000 for 12 numbers in the M800xxx area I found:

M800123 has a factor: 39697452239411289096120887
M800131 has a factor: 1236262353488699154645983
M800351 has a factor: 499211152072761829658937337
M800731 has a factor: 42794895872489861161754233

KingKurly · 2011-01-27, 17:09

Quote:

Originally Posted by alpertron

After running 220 ECM curves with B1=50000 for 12 numbers in the M800xxx area I found:

M800123 has a factor: 39697452239411289096120887
M800131 has a factor: 1236262353488699154645983
M800351 has a factor: 499211152072761829658937337
M800731 has a factor: 42794895872489861161754233

How'd you settle on 220 as the number of ECM curves to run? (Just curious) Normally I see 1, 3, and 150.

alpertron · 2011-01-27, 17:17

You can change the worktodo.txt file in order to do that. My idea was to complete the 25-digit level.

KingKurly · 2011-01-27, 17:36

Quote:

Originally Posted by alpertron

You can change the worktodo.txt file in order to do that. My idea was to complete the 25-digit level.

Ah, okay. I knew how to do it, I just wasn't sure why you had chosen 220, now I understand, thank you.

In an unrelated note, I've been doing a bunch of P-1 in the M198xxxx range and found some factors, if I have a chance I'll post them later. I hope to finish them ASAP because I hadn't yet figured out how to reserve exponents, but I did ensure that they weren't already reserved at the time I selected this range. I saw some people doing ECM in the M196xxxx and I hope to finish off any remaining unreserved exponents before they reach me. Now that I know how, in the future, I will ensure that all exponents are properly reserved. But I think I will be done with the unreserved ones in the next 24-48 hours, so I am not going to bother getting assignment IDs for them I suppose...

I just reserved M1979xxx (about 30 exponents) and will probably keep working my way around the upper portions of the 1.9M range -- as I mentioned, from now on, I will be reserving exponents in advance.

alpertron · 2011-01-28, 12:01

Another result in this area (5 factors from 13 numbers = 38% efficiency):

M800971 has a factor: 289524442699835508796196072489

firejuggler · 2011-01-28, 12:39

thanks to mfackt....

Quote:

M80622803 has a factor 156127704855377865257
M80547619 has a factor 164225854090231111921
M80623813 has a factor 74358285257003853433
M80465149 has a factor 205346902306982285351
M80645441 has a factor 74037992691676741151
M80429911 has a factor 33776959888323700737
M80625551 has a factor 110687074647006079529
M80589031 has a factor 46693727088018753713
M79154843 has a factor 68788380075731936863
M80701741 has a factor 57218973166606961263
M80309303 has a factor 118578090508483702721
M80696089 has a factor 66027939754284563593
M80699447 has a factor 47032613446676890273
M80630159 has a factor 5856285027082755031
M80700929 has a factor 44381842139698978511
M80701553 has a factor 45527575148762247041
M80624041 has a factor 37515177594283365607
M80581283 has a factor 70717839619935960241
M80701561 has a factor 55672736219070980281
M80650799 has a factor 51454583621456883601
M77224867 has a factor 39977700267067630681

in the last few days, all by TF

drh · 2011-01-28, 13:08

TF -

M80076611 has a factor: 306028098438561259951

KingKurly · 2011-01-30, 03:24

I just finished with the M198xxxx range. Most of them previously had P-1 with B1=B2=40000, and I did them all to B1=1000000, B2=30000000... kinda arbitrarily selected bounds, but they were fairly successful. I found 19 factors in 215 tests (8.84% success rate), with eight factors in Stage 1 and eleven factors in Stage 2.

Code:

 M1980023 has a factor: 13571695065543008351         (Stage 2)
 M1980247 has a factor: 1028007425734913593231       (Stage 2)
 M1980523 has a factor: 11068436810055540356047      (Stage 2)
 M1981409 has a factor: 437425184457765488071        (Stage 1)
 M1981493 has a factor: 98629747385844827351         (Stage 2)
 M1982989 has a factor: 6724437055332257192401       (Stage 1)
 M1983503 has a factor: 186794246935371583225132033  (Stage 2)
 M1983643 has a factor: 341312694343914135923033     (Stage 1)
 M1983913 has a factor: 31641965132080519849         (Stage 2)
 M1984069 has a factor: 1899812306079643525511       (Stage 2)
 M1985849 has a factor: 930999806671532321831        (Stage 2)
 M1985887 has a factor: 243125032539991259230127     (Stage 2)
 M1986199 has a factor: 2956613317747890929          (Stage 1)
 M1986337 has a factor: 31682922079570461988879      (Stage 1)
 M1987693 has a factor: 16044916528780756946806361   (Stage 1)
 M1988669 has a factor: 4129291590996270537719       (Stage 1)
 M1988887 has a factor: 5280340350328940238497       (Stage 1)
 M1989643 has a factor: 95213757966946302721         (Stage 2)
 M1989671 has a factor: 10604060702216236539257      (Stage 2)

NBtarheel_33 · 2011-01-31, 19:45

M60004691 has the stage 2 P-1 (91.52-bit, and prime) factor 3551945791320808519293061121.

ckdo · 2011-01-31, 21:14

M8338709 has a factor: 1011726731761493320698321583

90 bits. Prime. k=3^3*19*53*83*191*479*2269*129497. Stage 1.

2011-01-27, 14:41	#89
markr "Mark" Feb 2003 Sydney 23D₁₆ Posts	Three very nearly in a row! M2909701 has a factor: 34116886410693051247 k = 3 * 41^2 * 1913 * 607697 M2909749 has a factor: 165757446506320718519 k = 7 * 2417 * 7477 * 225157 M2909827 has a factor: 17618623784616481399 k = 3^3 * 257 * 281 * 1552643 All in P-1 stage #2, B1=105000, B2=2283750, E=6. I keep thinking I should reduce the bounds...

2011-01-27, 16:53	#90
alpertron Aug 2002 Buenos Aires, Argentina 2×683 Posts	ECM testing in M800xxx area After running 220 ECM curves with B1=50000 for 12 numbers in the M800xxx area I found: M800123 has a factor: 39697452239411289096120887 M800131 has a factor: 1236262353488699154645983 M800351 has a factor: 499211152072761829658937337 M800731 has a factor: 42794895872489861161754233

2011-01-28, 12:01	#94
alpertron Aug 2002 Buenos Aires, Argentina 2×683 Posts	Another result in this area (5 factors from 13 numbers = 38% efficiency): M800971 has a factor: 289524442699835508796196072489 Last fiddled with by alpertron on 2011-01-28 at 12:03

2011-01-31, 19:45	#98
NBtarheel_33 "Nathan" Jul 2008 Maryland, USA 5×223 Posts	P-1 stage 2 M60004691 has the stage 2 P-1 (91.52-bit, and prime) factor 3551945791320808519293061121.

2011-01-31, 21:14	#99
ckdo Dec 2007 Cleves, Germany 1000010010₂ Posts	P-1 stage 1 M8338709 has a factor: 1011726731761493320698321583 90 bits. Prime. k=3^31953831914792269*129497. Stage 1.

2011-01-27, 17:17	#92
alpertron Aug 2002 Buenos Aires, Argentina 2×683 Posts	You can change the worktodo.txt file in order to do that. My idea was to complete the 25-digit level.

2011-01-28, 13:08	#96
drh Jan 2011 Cincinnati, OH 2²×5² Posts	TF - M80076611 has a factor: 306028098438561259951

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