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-   -   Factoring humongous Cunningham numbers (https://www.mersenneforum.org/showthread.php?t=5722)

FactorEyes 2009-08-07 23:02

[QUOTE=R.D. Silverman;184372]Is Tom Womack working on 5,2,298+ and 5,4,298+ ...[/QUOTE]
I'm SNFS'ing my way through the remaining numbers on his page which are unreserved. I plan to finish off everything below SNFS 203, since I ECM'ed them almost halfway to t50 a couple of months ago.

I never gave those two numbers any ECM attention. I'll throw 3800 curves @B1=43e6 at them. With Tom's permission, I'll be happy to sieve them in a few weeks.

Not a huge priority - they'll get done one way or another. I'm thinking of knocking down a couple of the 4 remaining 3,2 composites, anyway.

xilman 2009-08-09 09:53

[QUOTE=xilman;184366]... an update to the tables is overdue, but I'm swamped by its size right now. Over 200 new factors have appeared since the last update and, unfortunately, Real Life (tm) has take priority. I'll post updates ASAP.[/QUOTE]The updated tables have just been posted. There were 249 new factorizations and there are now 1279 composites remaining.

Please let me know of any errors of attribution or omissions. With so many to deal with it's easily possible that I've screwed up.

My thanks to all the people working on these numbers. Two people in particular have been very productive.

Paul

Andi47 2009-08-09 11:58

[QUOTE=xilman;184679]The updated tables have just been posted. There were 249 new factorizations and there are now 1279 composites remaining.

Please let me know of any errors of attribution or omissions. With so many to deal with it's easily possible that I've screwed up.

My thanks to all the people working on these numbers. Two people in particular have been very productive.

Paul[/QUOTE]

Is there a reason why the new composites are not yet included into the [URL="http://www.chiark.greenend.org.uk/ucgi/~twomack/homcun.pl"]Reservation page[/URL]?

R.D. Silverman 2009-08-09 14:21

[QUOTE=Andi47;184690]Is there a reason why the new composites are not yet included into the [URL="http://www.chiark.greenend.org.uk/ucgi/~twomack/homcun.pl"]Reservation page[/URL]?[/QUOTE]


Also, a number of older composites (with exponent < 200) were
done recently [they are no longer on the reservations page], but they
did not appear in the update.

xilman 2009-08-09 19:46

[QUOTE=R.D. Silverman;184705]Also, a number of older composites (with exponent < 200) were
done recently [they are no longer on the reservations page], but they
did not appear in the update.[/QUOTE]Done by whom and with what result?

I can't find any reports of their completion other than the absence on the reservations page.


Paul

xilman 2009-08-09 19:47

[QUOTE=Andi47;184690]Is there a reason why the new composites are not yet included into the [URL="http://www.chiark.greenend.org.uk/ucgi/~twomack/homcun.pl"]Reservation page[/URL]?[/QUOTE]Yes.

Tom hasn't yet added them to his page.

Paul

R.D. Silverman 2009-08-09 20:01

[QUOTE=xilman;184747]Done by whom and with what result?

I can't find any reports of their completion other than the absence on the reservations page.
[/QUOTE]


Exactly!!!!

FactorEyes 2009-08-09 23:31

[QUOTE=xilman;184747]Done by whom and with what result?

I can't find any reports of their completion other than the absence on the reservations page.
[/QUOTE]

My bad: I am sitting on 9 SNFS results for these (5 SNFS 19X and 4 SNFS 201). They were placidly hibernating in the SendToXilman.txt file awaiting the end of this spasm of factoring. I figured I'd save you the trouble of opening a bunch of e-mails. Maybe not such a good idea.

Here you go - I have e-mailed a copy of these to you.
[CODE]
12^178+5^178
3459164911027717329965945961506825515428373
1166995310373024492182891103250036279557431318703797753
62689620978857841064550109684738181277216999918633438022001

12^179+11^179
685585468287097345989457178260839485703354866770324830425096798091360915628796951
47466318077085698587731433427323116204593728484434610175140467851228265675252576745617

12^179-11^179
3209497904464313097187602904349833199932202560152690011768497071861125171
2453631854762928819015237676810414380299311369496307558982694546463803824600144027905451164299707787

12^179-5^179
16817673204289620151021108690132466426353229318443596173
2322285334698686612275914666573971984044761037186588185415060743436042899687742391762745479

11^184+3^184
2503384756711746438767645005306994699348193375499941195201716241857
770143566636359365078618574574820520116842646357544938403810298479381282984817502217741584859944400689298773989819713

11^193-3^193
12310959785540218550338544562857284549932670487387
901651427435990263419774339482089261508542721033796467833186846874376366673173634820987703349036425588358575219863

11^193-2^193
1014908048604446894808692606578256104237197065014117471
3933101280931371610329322338665144363756463608888397796784858060424789761058977989043

11^193+7^193
100215400840055421860952408457230520894615452413713
579712929975190275273462567389261624072066997201076678974377762910504492222840769749007880048651281

11^193-9^193
67812403085311796202399466818862974017662874292251245065757078104157976039
3417888264858284049318498429711711691393803939588629312312478826710991345112556251[/CODE]

R.D. Silverman 2009-08-10 00:10

[QUOTE=FactorEyes;184768]My bad: I am sitting on 9 SNFS results for these (5 SNFS 19X and 4 SNFS 201). They were placidly hibernating in the SendToXilman.txt file awaiting the end of this spasm of factoring. I figured I'd save you the trouble of opening a bunch of e-mails. Maybe not such a good idea.

Here you go - I have e-mailed a copy of these to you.
[CODE]
12^178+5^178
3459164911027717329965945961506825515428373
1166995310373024492182891103250036279557431318703797753
62689620978857841064550109684738181277216999918633438022001

12^179+11^179
685585468287097345989457178260839485703354866770324830425096798091360915628796951
47466318077085698587731433427323116204593728484434610175140467851228265675252576745617

12^179-11^179
3209497904464313097187602904349833199932202560152690011768497071861125171
2453631854762928819015237676810414380299311369496307558982694546463803824600144027905451164299707787

12^179-5^179
16817673204289620151021108690132466426353229318443596173
2322285334698686612275914666573971984044761037186588185415060743436042899687742391762745479

11^184+3^184
2503384756711746438767645005306994699348193375499941195201716241857
770143566636359365078618574574820520116842646357544938403810298479381282984817502217741584859944400689298773989819713

11^193-3^193
12310959785540218550338544562857284549932670487387
901651427435990263419774339482089261508542721033796467833186846874376366673173634820987703349036425588358575219863

11^193-2^193
1014908048604446894808692606578256104237197065014117471
3933101280931371610329322338665144363756463608888397796784858060424789761058977989043

11^193+7^193
100215400840055421860952408457230520894615452413713
579712929975190275273462567389261624072066997201076678974377762910504492222840769749007880048651281

11^193-9^193
67812403085311796202399466818862974017662874292251245065757078104157976039
3417888264858284049318498429711711691393803939588629312312478826710991345112556251[/CODE][/QUOTE]

You were not the only one to continue with the older composites.
More than 9 numbers were factored (there are now only 33 of the 'older'
composites)

xilman 2009-08-10 06:59

[QUOTE=FactorEyes;184768]My bad: I am sitting on 9 SNFS results for these (5 SNFS 19X and 4 SNFS 201). They were placidly hibernating in the SendToXilman.txt file awaiting the end of this spasm of factoring. I figured I'd save you the trouble of opening a bunch of e-mails. Maybe not such a good idea.[/QUOTE]Now in my Inbox, thanks. They'll be in the next update, which I hope will occur more promptly than its predecessor.

It's generally a good idea to send results as soon as they are available. Most of my processing is automated so a few more factors are not significantly more expensive to deal with. More importantly, perhaps, credit is given strictly in order of receipt. If you sit on a result until after someone else has submitted the same factorization, you've essentially wasted your computation.


Paul

R.D. Silverman 2009-08-10 12:32

[QUOTE=R.D. Silverman;184772]You were not the only one to continue with the older composites.
More than 9 numbers were factored (there are now only 33 of the 'older'
composites)[/QUOTE]

A number of the missing/unreported factors were done by
Kay Schoenberger.


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