Forum: FactorDB
2019-12-06, 09:26
|
|
Replies: 39
Views: 22,747
torrent?
So, what's with the idea of a factordb torrent? If it is only 1GB then it should not be too hard right? Seems like it would potentially open up all kind of useful and not so useful derivative...
|
|
Forum: FactorDB
2019-11-29, 12:08
|
|
Replies: 39
Views: 22,747
|
|
Forum: FactorDB
2019-11-29, 08:37
|
|
Replies: 39
Views: 22,747
Factordb wipeout?
As some of you know, I have been interested in fully factored numbers of the form (M61^k-1)/(M61-1). People on this forum plus yoyo invested quite some effort and helped to factor quite a few of...
|
|
Forum: FactorDB
2019-11-29, 08:24
|
|
Replies: 3
Views: 6,763
|
|
Forum: Software
2018-05-19, 16:35
|
|
Replies: 10
Views: 3,098
|
|
Forum: NFS@Home
2018-05-17, 07:01
|
|
Replies: 2,466
Views: 174,063
|
|
Forum: Msieve
2018-05-17, 06:51
|
|
Replies: 2,205
Views: 214,327
|
|
Forum: NFS@Home
2018-05-16, 13:49
|
|
Replies: 2,466
Views: 174,063
|
|
Forum: NFS@Home
2018-05-16, 06:53
|
|
Replies: 2,466
Views: 174,063
|
|
Forum: NFS@Home
2018-05-15, 14:35
|
|
Replies: 2,768
Views: 172,617
|
|
Forum: NFS@Home
2018-05-14, 14:15
|
|
Replies: 2,768
Views: 172,617
|
|
Forum: Information & Answers
2018-05-14, 01:09
|
|
Replies: 69
Views: 13,222
|
|
Forum: CADO-NFS
2018-05-13, 01:52
|
|
Replies: 522
Views: 106,237
Ran a c140 on cado, just to get familiar. The...
Ran a c140 on cado, just to get familiar. The number was an snfs, with a natural octic. Cado rejects octics, so i downconverted to a septic which looked decent enough, but has a yield which is way...
|
|
Forum: GMP-ECM
2018-05-12, 05:57
|
|
Replies: 8
Views: 5,145
How precise you want to be?
Here is a decent...
How precise you want to be?
Here is a decent formula:
TIME [min] = 1min * (B1/10^7) * (Digits/100)^1.5 * ( 2Ghz / f )
Accuracy is at 5-10% level, you adjust the last factor to your hardware...
|
|
Forum: Cunningham Tables
2018-05-12, 05:22
|
|
Replies: 77
Views: 35,450
|
|
Forum: Cunningham Tables
2018-05-12, 03:58
|
|
Replies: 77
Views: 35,450
yoyo@home found a 67-digit factor of...
yoyo@home found a 67-digit factor of C243_M127_k24.
Many thanks!
Using B1=260000000, B2=3178559884516, polynomial Dickson(30), sigma=0:11839839710820506480
Step 2 took 328547ms
**********...
|
|
Forum: Cunningham Tables
2018-05-11, 07:24
|
|
Replies: 77
Views: 35,450
Mathematicians: 1 - Amateurs: 0
OK, i got...
Mathematicians: 1 - Amateurs: 0
OK, i got some private schooling from Silverman, that and a little bit more reading of their paper concentrated my mind.
I was in error, so sorry to everyone for...
|
|
Forum: Cunningham Tables
2018-05-10, 15:44
|
|
Replies: 77
Views: 35,450
That thread has a very fine post by Dubslow at...
That thread has a very fine post by Dubslow at #35, which is totally in agreement with what I'm trying to say here: the recommended curves at 5 digit steps are too much! But until now noone has been...
|
|
Forum: Cunningham Tables
2018-05-10, 08:00
|
|
Replies: 77
Views: 35,450
What we are missing here is what the economists...
What we are missing here is what the economists call a utility function. Someplace in that paper, Silverman and Wagstaff point out that running curves to 1-1/e probability of success is optimal in...
|
|
Forum: Cunningham Tables
2018-05-10, 05:53
|
|
Replies: 77
Views: 35,450
|
|
Forum: Cunningham Tables
2018-05-10, 04:42
|
|
Replies: 77
Views: 35,450
nice paper
Nice paper by Silverman and Wagstaff, I'm reading it. The main contribution is to calculate B2 from given B1, it seems.
OK, so the exact factor is e, not 2. Close enough for me :smile: Sadly,...
|
|
Forum: Cunningham Tables
2018-05-09, 12:53
|
|
Replies: 77
Views: 35,450
|
|
Forum: Cunningham Tables
2018-05-08, 02:05
|
|
Replies: 77
Views: 35,450
p258550963755000298476185095462811 divides...
p258550963755000298476185095462811 divides M127_k71, but
sadly the cofactor is composite. I am going to try to continue, but not for now.
Request:
The following need more curves at 1e7, you can...
|
|
Forum: Hardware
2018-05-07, 06:00
|
|
Replies: 5
Views: 1,909
|
|
Forum: Cunningham Tables
2018-05-04, 12:05
|
|
Replies: 77
Views: 35,450
|
