20130627, 13:22  #1  
"Frank <^>"
Dec 2004
CDP Janesville
2122_{10} Posts 
Poly search candidates
Quote:
Code:
a115302.i5902 c150: 722986402529387761531523245174740725218763586252727774665788018930931517968238781361941678683265501221456903023062936317170941945069518708941274228073 a7044.i3420 c163: 1069286439460530805668612534096557556319118307440678075882272080432198210140482055955419148293522070111238366691021950622658624812365704607046438999695718693112229 a572000.i3128 c150: 122376126144695612022009890341256236363641981363125998702726545592271314432434257780727895029949816564645168871916657082807007147983169173961146078109 a611156.i7542 c155: 58035019786194098807181925479740537352988162044968814759257077868985812298144342954852184074381182357631459257468349391638272898828522380388658996312387583 For something to compare to, here is a poly I found for a c161 from a363270.i1775: Code:
n: 91572763939319037745727514758662679674088061621685557085664194173403532319145745043107884001905080870498879201294878091215721815926596888093059278470362580371507 # norm 1.095460e015 alpha 7.627276 e 1.156e012 rroots 5 skew: 33361457.56 c0: 383355381299806903665668126264661160636400 c1: 4045284341356807274846442992265900 c2: 2318642919279642643732932976 c3: 4805046335712948621 c4: 2748629879684 c5: 5124 Y0: 28211802837843590414718838382517 Y1: 363459609449559037 

20130627, 18:32  #2 
I moo ablest echo power!
May 2013
6CD_{16} Posts 
I'd be happy to work on the C155. I'll start the poly searching today.

20130627, 22:35  #3 
Apr 2010
Over the rainbow
5×503 Posts 
a very quick search on the first c150
Code:
# norm 1.609539e014 alpha 8.035676 e 5.060e012 rroots 5 skew: 55072249.88 c0: 1819977917444241850538479411223658896160 c1: 1771423220507065762039012633780080 c2: 61832710225179014067573822 c3: 4804805510554134361 c4: 15968892176 c5: 120 Y0: 359740968067837562238081234761 Y1: 3807520958703259 
20130628, 03:56  #4 
"Curtis"
Feb 2005
Riverside, CA
2^{2}×1,151 Posts 
I'll do a GPUday on the C155 also, to compare results, and then start on the C163. I'll keep doing the 3 steps separately, to see how results vary vs the np1nps combo.
Curtis 
20130628, 08:27  #5 
Apr 2010
Over the rainbow
9D3_{16} Posts 
Eight hours later, no improvement on the C150 poly
Last fiddled with by firejuggler on 20130628 at 08:27 
20130628, 16:37  #6 
Apr 2010
Over the rainbow
5·503 Posts 
a light poly for the 163
Fri Jun 28 18:35:35 2013 R0: 85947222884751164428165834069570 Fri Jun 28 18:35:35 2013 R1: 11198382273354161 Fri Jun 28 18:35:35 2013 A0: 90871099326788541532725912746222919655521 Fri Jun 28 18:35:35 2013 A1: 1792856973270648979649109055958235 Fri Jun 28 18:35:35 2013 A2: 462294595261376402965340374 Fri Jun 28 18:35:35 2013 A3: 6142380049087671731 Fri Jun 28 18:35:35 2013 A4: 119766512679 Fri Jun 28 18:35:35 2013 A5: 228 Fri Jun 28 18:35:35 2013 skew 63700732.89, size 7.874e016, alpha 5.911, combined = 9.716e013 rroots = 5 
20130628, 21:02  #7 
Just call me Henry
"David"
Sep 2007
Cambridge (GMT/BST)
16A2_{16} Posts 
Looking at your polys, firejuggler, they all start with small leading coefficients and as a consequence have huge skew. It might be worth you searching at a higher leading coefficient.

20130628, 21:24  #8 
Apr 2010
Over the rainbow
5·503 Posts 
As mentionned earlier, those are *quickanddirty* search, just done to give an idea of the poly score.

20130628, 22:59  #9 
Apr 2010
Over the rainbow
5·503 Posts 
here is a more serious search for the first C 150
Code:
# norm 1.444667e014 alpha 6.917632 e 4.814e012 rroots 3 skew: 841145.75 c0: 325738126959923032706969414442066400 c1: 1840003628971626993662283648330 c2: 225769551869279160391393 c3: 3762824820552507006 c4: 2143214131752 c5: 1686960 Y0: 53260479116005806504982958319 Y1: 13372535599069 
20130629, 01:51  #10 
I moo ablest echo power!
May 2013
1,741 Posts 
Here's an initial result for the C163:
Code:
expecting poly E from 9.45e013 to > 1.09e012 polynomial selection complete R0: 6390374448189173278546531251014 R1: 19504335320833379 A0: 20025904729622787109637795434613157531 A1: 413767607592671960996692844369211 A2: 895005471926494085299577289 A3: 374505915870943397111 A4: 430367904368930 A5: 100337328 skew 1369087.07, size 6.093e016, alpha 7.290, combined = 8.247e013 rroots = 5 Edit: Here's one with a slightly better score with a much lower skew: Code:
polynomial selection complete R0: 6389956263867362886877922677130 R1: 33280324830544727 A0: 767797939339909723668396375755528757 A1: 33215971061213227743193900791371 A2: 370232822547281454298146599 A3: 315552628829057509909 A4: 646291445176044 A5: 100370160 skew 709419.34, size 6.326e016, alpha 6.967, combined = 8.418e013 rroots = 5 Last fiddled with by wombatman on 20130629 at 02:34 
20130629, 03:47  #11 
I moo ablest echo power!
May 2013
1,741 Posts 
And here's what I've gotten from ~1 day of GPU searching on the C155. Not great, but a good start.
Code:
expecting poly E from 2.61e012 to > 3.00e012 polynomial selection complete R0: 6119479740188029422377425 R1: 2635387682623 A0: 42492734092992596689899104401432272 A1: 276970245278370518463806817308 A2: 54986121077830867971702912 A3: 21087170634838748433 A4: 3474626431755520 A5: 129010006404 A6: 1105104 skew 65069.71, size 3.420e011, alpha 8.637, combined = 7.509e013 rroots = 4 Last fiddled with by wombatman on 20130629 at 03:47 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Poly Search vs Sieving times  EdH  Factoring  10  20131014 20:00 
Resume msieve poly search job?  Andi47  Msieve  1  20110328 04:30 
gpu poly search error  bdodson  Msieve  10  20101109 19:46 
Poly search for c157 from 4788:2422  henryzz  Aliquot Sequences  59  20090704 06:27 
Poly search for c137 from 4788:2408  axn  Aliquot Sequences  15  20090528 16:50 