Polynomial Request Thread

[wombatman]

Minor details

[swellman]

Originally Posted by wombatman

polynomial selection complete
R0: -1218423089286444403180113917
R1: 23258540774071
A0: 3594145623147156846353534367557400
A1: 73328877321934102656644258040
A2: -308579838389273978193608
A3: -853957752589087195
A4: 1705125392418
A5: 1940400
skew 423678.78, size 9.496e-014, alpha -7.391, combined = 1.603e-011 rroots = 5
elapsed time 02:10:35

(Kidding around, of course. I had dropped the stage 1 and 2 norms by 1/10 of default choice and limited the minimum e-score to 1.4e-11, so it was probably able to complete more quickly than usual.)

Thanks wombatman!

[swellman]

34455969275555543008894959549834908911628105576528370596905240101374255465270440968637373665134441021829321232908692364288101466106630998208891527349709493825004569737350006429544430702041657691

Possible GNFS candidate which recently survived ECM.

amphoria found a decent polynomial for this number:

# norm 6.010324e-019 alpha -7.291559 e 1.119e-014 rroots 3
skew: 314183815.04
c0: 42200690310394645731006573695629365784697161008
c1: -4174931980001203202982947992258045649412
c2: 34314236194563307930578628324180
c3: 171993435884563172649601
c4: -165572939397788
c5: 130548
Y0: -48339132221599400156975896129259741483
Y1: 76780817191247017

Can more searching be run? The expected e-score is 1.16e-014 to < 1.33e-014.

Thanks for any help.

[frmky]

At Sam's request, NFS@Home will factor the smallest five Bernoulli/Euler numbers. Details of the project are at http://homes.cerias.purdue.edu/~ssw/...lli/index.html

These numbers are below. We need polynomials for all five. Thanks in advance!

c193 E,162  4433412106658741087933232089378724397906206646379922900251289622751707498087510521673827952479387101476055350479732960366249816761504231219756875500959872022188279008190800161931436720491245839
c198 N,228  296569147970687972018305992022305479444800534802596868167612154770357922331944290632711595707525008075052827152208842160028802232479554533007880867580604612496376331014306272671066168224885301922139
c200 E,192  38520071631718399385569612596870425832813667446322377950818788712501250551228139856601338294522891553906379588542169718154722596682565080979763328866848000587896648249672528064585979301197677287093573
c202 E,148  3288719081408570989091469257524004512856169702169344935878936181981622152040418051052138482890793620819361069696255059446484398066989546855559239020999441385627314503459380878410208878448073950298808719
c208 N,248  1832286501854003138052676989520560424403225562007684729403530852600313798697523554946311839528638518912406077110670650069044969139294389942454684694590767301444969837766981072288000680734361752459501676835073

[pinhodecarlos]

Greg,

Did Sam give you any timeframe for the completion of these factorisations? Just asking so I can start requesting more CPU power to the 16e grid.

Carlos

[Dubslow]

Originally Posted by pinhodecarlos

Greg,

Did Sam give you any timeframe for the completion of these factorisations? Just asking so I can start requesting more CPU power to the 16e grid.

Carlos

If I may, aren't we/you perpetually scrambling to find work for the grid, for all three sievers?

Why then, upon being given a good backlog for which time you needn't continually scramble for work, would you ask for help in returning to a state where you're continually scrambling for work?

IOW, let the grid do it's thing for a few months, no need to run a challenge or whatever -- and everyone can relax a bit.

[pinhodecarlos]

Few years ago B200 was requested to be sieved by NFS putting in hold 2,1019-, so the factors could be published on a book. My question is to understand if the situation is the same, nothing else.

[Dubslow]

Originally Posted by pinhodecarlos

Few years ago B200 was requested to be sieved by NFS putting in hold 2,1019-, so the factors could be published on a book. My question is to understand if the situation is the same, nothing else.

Ah yes of course, my apologies, I didn't not properly digest your comment (or I read it too fast, or really probably both).

[Max0526]

Found by CADO-NFS, optimized by Msieve:

Msieve v. 1.52 (SVN 958)
R0: -37237673495959432845547960495432310601
R1: 455963204264742494407837
A0: -40858140884534785879919274785969183461857297640
A1: 1382947686117420912116904562429370450394
A2: 50967351727716234490652497391035
A3: -326241960100326922890507
A4: -2452643091322692
A5: 2352960
skew 149942383.58, size 5.032e-019, alpha -7.885, combined = 1.134e-014

[frmky]

Originally Posted by Dubslow

If I may, aren't we/you perpetually scrambling to find work for the grid, for all three sievers?

Why then, upon being given a good backlog for which time you needn't continually scramble for work, would you ask for help in returning to a state where you're continually scrambling for work?

IOW, let the grid do it's thing for a few months, no need to run a challenge or whatever -- and everyone can relax a bit.

No, no deadline. And there's plenty of work for the 16e siever. It's only 14e and 15e that are a challenge to keep fed.

[Max0526]

Found by CADO-NFS, optimized by Msieve:

Msieve v. 1.52 (SVN 958)
R0: -25458591320354415306047771868033721261
R1: 25122921992410460190901
A0: -59689589700072952603898502490039932542359419360
A1: -6176744675128243537237938243158981850428
A2: -77642550985079499317746337173065
A3: 239686316067230081965023
A4: 1816020209772280
A5: -4145400
skew 187999411.64, size 5.672e-019, alpha -7.942, combined = 1.215e-014