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Old 2021-02-06, 22:00   #232
Batalov
 
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I would suggest the low-hanging fruit of base-2 extensions. Those might yield some hits because SSW himself just pulled a p56, so there are some p5x factors in this set sans 3+ that are already done : https://homes.cerias.purdue.edu/~ssw/cun/xtend/up7.txt

But there is a good argument to continue hitting hard on Base-2 main, too. Three inch punch! It really worked for her in the end!
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Old 2021-02-19, 01:42   #233
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Quote:
Originally Posted by VBCurtis View Post
EDIT2: ETA is just under 10 days, running on all 20 cores without MPI. I recently updated that machine to Ubuntu 20.04, so I may try to get the MPI fix applied and see how msieve-MPI performs on it.
It's been a few weeks. Guessing you put this on hold to work on something else?
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Old 2021-02-19, 02:19   #234
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Whoops! Sorry, I was so eager to jump on the quartic from the Cunningham extensions that I forgot to post factors when the matrix finished:
Code:
Sun Jan 31 00:34:01 2021  p82 factor: 8839572613855891331570438385350118192600962609702949549624218311059899144936218181
Sun Jan 31 00:34:01 2021  p109 factor: 3241497049926344989867894223963855082968056873457044230450152346084471878024227245959456141481343243331475641
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Old 2021-02-19, 02:26   #235
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Good job everyone! 20 days from start to finish isn't too shabby

Curtis, have you sent the factors to Sam Wagstaff?
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Old 2021-02-19, 02:56   #236
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Negative. First report anywhere is two posts up.
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Old 2021-02-19, 03:02   #237
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OK, might as well send them myself then...
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Old 2022-04-03, 16:54   #238
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Default 2,2278L ECM by Yoyo

Just noticed Yoyo found a p65 factor for one of the 1987 list of base 2 Cunninghams using a B1 value of 2.9e9.

Code:
86589010851535459544841976281763660155609171540423705702879490649
2,2278L is now fully factored.

I presume Yoyo will notify Prof. Wagstaff.

Last fiddled with by swellman on 2022-04-03 at 17:18
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Old 2022-04-03, 19:49   #239
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Quote:
Originally Posted by swellman View Post
Just noticed Yoyo found a p65 factor for one of the 1987 list of base 2 Cunninghams using a B1 value of 2.9e9.

Code:
86589010851535459544841976281763660155609171540423705702879490649
2,2278L is now fully factored.

I presume Yoyo will notify Prof. Wagstaff.
I have been unable to contact yoyo for over a year now.

Anyone else had success?
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Old 2022-04-03, 21:01   #240
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Quote:
Originally Posted by xilman View Post
I have been unable to contact yoyo for over a year now.

Anyone else had success?
He's been quite active in the Aliqueit n^i thread as recent as early March.
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Old 2022-04-03, 21:05   #241
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Quote:
Originally Posted by xilman View Post
I have been unable to contact yoyo for over a year now.

Anyone else had success?
I just swapped emails with him today.

PM me for more info.
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