Pascal's OPN roadblock files - Page 2

RichD · 2014-02-05, 21:42

Quote:

Originally Posted by RichD

In the coming weeks/months I will continue working on all the numbers below C200 in the list of most difficult numbers.

Wow, a lot more in the C190s. All the other "ten" ranges only had 4 or 5 composites. This range still has 21 remaining. I've generated all the SNFS polynomials. Most are Sigma(n^46) which is most suitable for degree-6.

PM me if you would like one or more to work on and I will send you the poly file. Each will take 5-6 days on a dedicated Core-i5. Just start factMsieve with the poly file and let it run. Let me know if anyone is interested, or you can pick one from the file itself. Just let me know which you choose so we don't duplicate work.

They range from SNFS-192 to SNFS-204 difficulty.

chris2be8 · 2014-02-11, 16:35

Will the "most difficult" composites need ECM running against them before SNFS? I can do it either way, but needs to be allowed for.

Chris

RichD · 2014-02-11, 16:52

Quote:

Originally Posted by chris2be8

Will the "most difficult" composites need ECM running against them before SNFS? I can do it either way, but needs to be allowed for

In my last correspondence with Pascal, he said a decent number of curves have been run but he doesn't keep track. So far, I haven't had an "ECM miss".

I will stop before getting to a C200. Though a C198 may be an SNFS-204 difficulty.

ThomRuley · 2014-02-12, 01:10

Could I talk you into making a few polys from the t500 file? Mine are taking forever, but the actual NFS seems to be moving reasonably.

wombatman · 2014-02-12, 02:31

Thom, which ones from the t500 file are you looking at? I've cleared a few from there (and am working my way down the list).

ThomRuley · 2014-02-12, 14:51

I'll take these for now:

6115909044841454629 12
321381569252585866953628783126948367071187906389518216907098417372109834635071531 2
9235379541700294893241592533312191410548921 4
18855337777262169791 10
42223362249943191270479011547514088211349705097809873373648793992949125900561049993 2
33579221106357041 12

Let me know if anyone else is already working on these.

Thanks

Thom

wombatman · 2014-02-12, 16:15

I'll have to double check when I get home, but I believe I'm currently on:

53041017196666952234619819994982127672443220243418249007541741030212106804476059 2

No idea if anybody else is working on the file, but I'll take those off my batch list if you want them. Roughly how long will each of them take, do you think?

ThomRuley · 2014-02-12, 20:22

Quote:

Originally Posted by wombatman

I'll have to double check when I get home, but I believe I'm currently on:

53041017196666952234619819994982127672443220243418249007541741030212106804476059 2

No idea if anybody else is working on the file, but I'll take those off my batch list if you want them. Roughly how long will each of them take, do you think?

No problem, I'll just take that one off my list. This is why we need to communicate with each other about composites. Thanks

wombatman · 2014-02-13, 03:24

Well, I'm getting forgetful already, but I'm actually working on:

20241187^29-1
C151

It should be finished by Friday evening.

RichD · 2014-02-13, 04:25

I can't seem to locate the wiki page on degree halving but I will post two polys from the t500.txt file if anyone is interested.

Code:

82932783659784864101 10

n: 14668426862825327643478642613752190334921815625710231530196536758731353111989670069823132151031683951702388087602570541194382925113356037064684273416829280380908509371047337
# 82932783659784864101^11-1, difficulty: 199.19, skewness: 1.00, alpha: 2.22
# cost: 1.3144e+17, est. time: 62.59 GHz days (not accurate yet!)
skew: 1.000
c5: 1
c4: 1
c3: -4
c2: -3
c1: 3
c0: 1
Y1: -82932783659784864101
Y0: 6877846605560679357661513062775038538202
m: 6638302919148143756548444023751343110512646774028322539454017523519024748726117291987933565320356252394470990730374728987385239556102040293564160261777386744194135007509561
type: snfs


1949751789915161 12

n: 178582760001354166553578106439433291393431180054089262671541219332034706214132826774027843833802708445291048587466523534490409654996494041174800154595618546224102815160715367622393
# 1949751789915161^13-1, difficulty: 183.48, skewness: 1.00, alpha: 3.10
# cost: 3.21513e+16, est. time: 15.31 GHz days (not accurate yet!)
skew: 1.000
c6: 1
c5: 1
c4: -5
c3: -4
c2: 6
c1: 3
c0: -1
Y1: -1949751789915161
Y0: 3801532042277374115783577655922
m: 178582759999806160677961385995543625559262607541818145383600310736688148336500964108316190094531539174959912589299553133029586112864519785072165516315129152499838566672770974464982
type: snfs

wombatman · 2014-02-13, 04:31

I'll tackle that second one (1949751789915161^13-1). How did you generate those SNFS polys?

Edit: I must be doing something wrong. When I use that generated poly, I get really huge sec/rel times (like 2 to 5 sec/rel). What am I forgetting? This is with the 64-bit GGNFS sievers.

2014-02-13, 04:31	#22
wombatman I moo ablest echo power! May 2013 2²×463 Posts	I'll tackle that second one (1949751789915161^13-1). How did you generate those SNFS polys? Edit: I must be doing something wrong. When I use that generated poly, I get really huge sec/rel times (like 2 to 5 sec/rel). What am I forgetting? This is with the 64-bit GGNFS sievers. Last fiddled with by wombatman on 2014-02-13 at 05:01

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Passive Pascal	Xyzzy	GPU Computing	1	2017-05-17 20:22
Tesla P100 — 5.4 DP TeraFLOPS — Pascal	Mark Rose	GPU Computing	52	2016-07-02 12:11
Nvidia Pascal, a third of DP	firejuggler	GPU Computing	12	2016-02-23 06:55
Calculating perfect numbers in Pascal	Elhueno	Homework Help	5	2008-06-12 16:37
Factorization attempt to a c163 - a new Odd Perfect Number roadblock	jchein1	Factoring	30	2005-05-30 14:43

2014-02-11, 16:35	#13
chris2be8 Sep 2009 2×1,213 Posts	Will the "most difficult" composites need ECM running against them before SNFS? I can do it either way, but needs to be allowed for. Chris

2014-02-12, 01:10	#15
ThomRuley May 2003 3·97 Posts	Could I talk you into making a few polys from the t500 file? Mine are taking forever, but the actual NFS seems to be moving reasonably.

2014-02-12, 02:31	#16
wombatman I moo ablest echo power! May 2013 73C₁₆ Posts	Thom, which ones from the t500 file are you looking at? I've cleared a few from there (and am working my way down the list).

2014-02-12, 14:51	#17
ThomRuley May 2003 3·97 Posts	I'll take these for now: 6115909044841454629 12 321381569252585866953628783126948367071187906389518216907098417372109834635071531 2 9235379541700294893241592533312191410548921 4 18855337777262169791 10 42223362249943191270479011547514088211349705097809873373648793992949125900561049993 2 33579221106357041 12 Let me know if anyone else is already working on these. Thanks Thom

2014-02-12, 16:15	#18
wombatman I moo ablest echo power! May 2013 2²×463 Posts	I'll have to double check when I get home, but I believe I'm currently on: 53041017196666952234619819994982127672443220243418249007541741030212106804476059 2 No idea if anybody else is working on the file, but I'll take those off my batch list if you want them. Roughly how long will each of them take, do you think?

2014-02-13, 03:24	#20
wombatman I moo ablest echo power! May 2013 73C₁₆ Posts	Well, I'm getting forgetful already, but I'm actually working on: 20241187^29-1 C151 It should be finished by Friday evening.