[QUOTE=RichD;511417]It will be a day before I can get to it. If you happen to get it working today, feel free to run with it. Just let me know. I will start on it first thing tomorrow (Sat.) morning.[/QUOTE]

I'll give it a shot and let you know one way or the other.

[QUOTE=richs;511425]I'll give it a shot and let you know one way or the other.[/QUOTE]

I tried a v1.54 SVN 1018 Sandy Bridge executable (posted by ATH in February 2018) and had the same result that I posted earlier. I couldn't find a Sandy Bridge executable for SVN 1028.

So please give it a try, Rich.

The problem is with the .fb file. It's missing the top two terms. If you add them back in, then msieve will work:
[code]
N 75330216856137242943568661496039575792022245053130355286525978768752700651704203724808386902382706870787846630150371114552533611444654144007867843455062345826898449449861606680844659120012445664963644577
SKEW 1.0
[COLOR="Red"]A8 1
A7 1
[/COLOR]A6 -7
A5 -6
A4 15
A3 10
A2 -10
A1 -4
A0 1
R1 -4784213763211
R0 22888701332097558377030522
FRMAX 33500000
FAMAX 67000000
SRLPMAX 1073741824
SALPMAX 1073741824
[/code]

[QUOTE=jyb;511451]The problem is with the .fb file. It's missing the top two terms. If you add them back in, then msieve will work:
[code]
N 75330216856137242943568661496039575792022245053130355286525978768752700651704203724808386902382706870787846630150371114552533611444654144007867843455062345826898449449861606680844659120012445664963644577
SKEW 1.0
[COLOR="Red"]A8 1
A7 1
[/COLOR]A6 -7
A5 -6
A4 15
A3 10
A2 -10
A1 -4
A0 1
R1 -4784213763211
R0 22888701332097558377030522
FRMAX 33500000
FAMAX 67000000
SRLPMAX 1073741824
SALPMAX 1073741824
[/code][/QUOTE]

Strange that. 11681692691969_17m1 is also an octic, and it is missing A7 and A8 in the .fb as well. Does NFS@Home use an older version of msieve?

[QUOTE=swellman;511455]Strange that. 11681692691969_17m1 is also an octic, and it is missing A7 and A8 in the .fb as well. Does NFS@Home use an older version of msieve?[/QUOTE]

Yes, r961. I believe the patch was added in r987. (thanks to jyb.)

I'll give 4784213763211_17m1 another try. Thanks for the detective work.

2879_61m1 I results
 

[QUOTE=Jarod;511013]If no one has already reserved 2879_61m1 I would like to reserve it please. [/QUOTE]
Please find result attached.
[Code] p89 factor: 55207279612323131975547848492541856282980742724641695441779575760288022751420330173070693
p112 factor: 7177683349665275986272568409463072389389122510997393613842803200933481202919803710832858670987307588473045008093 [/code]

[QUOTE=richs;511457]I'll give 4784213763211_17m1 another try. Thanks for the detective work.[/QUOTE]

We are going to need more sieving since there was a duplicate rate of about 38%:

[CODE]skipped 3 relations with b > 2^32
skipped 549 relations with composite factors
found 36916492 hash collisions in 121393897 relations
added 1828991 free relations
commencing duplicate removal, pass 2
found 46097126 duplicates and 77125762 unique relations
memory use: 724.8 MB
reading ideals above 94044160
commencing singleton removal, initial pass
memory use: 1506.0 MB
reading all ideals from disk
memory use: 1446.7 MB
commencing in-memory singleton removal
begin with 77125762 relations and 74341875 unique ideals
reduce to 36616619 relations and 28149143 ideals in 22 passes
max relations containing the same ideal: 25
reading ideals above 720000
commencing singleton removal, initial pass
memory use: 753.0 MB
reading all ideals from disk
memory use: 1390.5 MB
keeping 38763768 ideals with weight <= 200, target excess is 183498
commencing in-memory singleton removal
begin with 36616625 relations and 38763768 unique ideals
reduce to 35814534 relations and 37959534 ideals in 18 passes
max relations containing the same ideal: 200
filtering wants 1000000 more relations
elapsed time 01:16:16[/CODE]

10M Q added.

Then more will probably be needed for 11681692691969_17m1 also.

[B]Kicked up Q by 10M[/B]

Taking 9173_61m1.