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 [URL="https://homes.cerias.purdue.edu/~ssw/cun/xtend/appc7.txt"]in this set[/URL] sans 3+ that are already done : [url]https://homes.cerias.purdue.edu/~ssw/cun/xtend/up7.txt[/url]

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!

[QUOTE=VBCurtis;569777]
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.[/QUOTE]

It's been a few weeks. Guessing you put this on hold to work on something else?

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[/code]

Log attached.

Good job everyone! 20 days from start to finish isn't too shabby :smile:

Curtis, have you sent the factors to Sam Wagstaff?

Negative. First report anywhere is two posts up. :no:

OK, might as well send them myself then...

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[/code]

2,2278L is now fully factored.

I presume Yoyo will notify Prof. Wagstaff.

[QUOTE=swellman;603207]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[/code]

2,2278L is now fully factored.

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

Anyone else had success?

[QUOTE=xilman;603218]I have been unable to contact yoyo for over a year now.

Anyone else had success?[/QUOTE]He's been quite active in the Aliqueit n^i thread as recent as early March.

[QUOTE=xilman;603218]I have been unable to contact yoyo for over a year now.

Anyone else had success?[/QUOTE]

I just swapped emails with him today.

PM me for more info.