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Old 2018-01-31, 15:24   #628
VBCurtis
 
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Quote:
Originally Posted by henryzz View Post
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.
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Old 2018-01-31, 17:02   #629
chris2be8
 
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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
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Old 2018-02-02, 03:17   #630
hyramgraff
 
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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
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Old 2018-02-04, 12:30   #631
lorgix
 
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Default t2100

31^257-1 is divisible by p50.
p50 = 35890392908870171521864015727558211438952448644537
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Old 2018-02-05, 04:09   #632
hyramgraff
 
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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
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Old 2018-02-09, 06:01   #633
hyramgraff
 
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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
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Old 2018-02-09, 07:46   #634
henryzz
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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
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Old 2018-02-09, 08:48   #635
lavalamp
 
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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.
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Old 2018-02-09, 10:19   #636
Wick
 
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Quote:
Originally Posted by henryzz View Post
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
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Old 2018-02-09, 13:09   #637
henryzz
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Quote:
Originally Posted by Wick View Post
If you post it here I'll go through it
https://www.sendspace.com/file/gd8bjo
I went through upto 555 digits above.
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Old 2018-02-09, 15:01   #638
Wick
 
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Quote:
Originally Posted by henryzz View Post
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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