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2018-01-31, 15:24   #628
VBCurtis

"Curtis"
Feb 2005
Riverside, CA

2·3·751 Posts

Quote:
 Originally Posted by henryzz If factors/day is your aim then you should probably run curves at a higher level. It will take longer to complete 25 digits but you will find a lot more factors >25 digits and there will be less to do for 30 digits.
This. Try some intermediate values of B1, e.g. run a day or two at B1 = 100k and see how your rate of factors-found changes. I expect you'll find nearly as many factors, while more of them will be 28-to-32 digits than before. If so, go to 150k for a couple days, repeat until the rate drops off or you get bored.

 2018-01-31, 17:02 #629 chris2be8     Sep 2009 22×487 Posts A SNFS 200 quartic is bad because the rational norm is much larger than the algebraic norm. One thing I've wondered is if it's possible to use a quadratic (degree 2) on the rational side instead of the usual linear (degree 1). I've heard of using two quadratics for GNFS, one on each side, but I can't remember where. It wasn't competitive with the normal way though. Chris
 2018-02-02, 03:17 #630 hyramgraff   Jan 2018 3×11 Posts Here are two more full factorizations from the t2100 file. C532 = P32 * PRP501 http://factordb.com/index.php?id=1100000000438624599 C653 = P33 * PRP621 http://factordb.com/index.php?id=1100000000450836049
 2018-02-04, 12:30 #631 lorgix     Sep 2010 Scandinavia 11478 Posts t2100 31^257-1 is divisible by p50. p50 = 35890392908870171521864015727558211438952448644537
 2018-02-05, 04:09 #632 hyramgraff   Jan 2018 3×11 Posts Here are two more full factorizations from the t2100 file: C659 = P30 * PRP630 http://factordb.com/index.php?id=1100000000655014354 C862 = P27 * PRP836 http://factordb.com/index.php?id=1100000000685532706
 2018-02-09, 06:01 #633 hyramgraff   Jan 2018 1000012 Posts I just noticed that there are now less than 65,000 composites in the t2100 file. Great work everyone! Also, here's another full factorization from the t2100 file: C826 = P27 * PRP800 http://factordb.com/index.php?id=1100000000615521636
 2018-02-09, 07:46 #634 henryzz Just call me Henry     "David" Sep 2007 Cambridge (GMT/BST) 575410 Posts I have a bunch in a long log file if anyone wants to sort through them. My 1 curve at 1e6 run found a lot
 2018-02-09, 08:48 #635 lavalamp     Oct 2007 London, UK 1,319 Posts Trying my hand at some GNFS: 459913866740209041331349460680262230936475470929114765151226584224482455774571483444467129409276961^3-1 Seems like composites around 140 - 150 digits should take a couple of days to a week for me.
2018-02-09, 10:19   #636
Wick

Nov 2012

23×32 Posts

Quote:
 Originally Posted by henryzz I have a bunch in a long log file if anyone wants to sort through them. My 1 curve at 1e6 run found a lot
If you post it here I'll go through it

2018-02-09, 13:09   #637
henryzz
Just call me Henry

"David"
Sep 2007
Cambridge (GMT/BST)

2·3·7·137 Posts

Quote:
 Originally Posted by Wick If you post it here I'll go through it
https://www.sendspace.com/file/gd8bjo
I went through upto 555 digits above.

2018-02-09, 15:01   #638
Wick

Nov 2012

23×32 Posts

Quote:
 Originally Posted by henryzz https://www.sendspace.com/file/gd8bjo I went through upto 555 digits above.
all reported 52 new factors ow which 2 FF

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