[QUOTE=XYYXF;383083]But that's the number reserved by you. Move it to Ryan?[/QUOTE]

Yes, you can move it to Ryan. I've run over 17k curves on it @B1=110M to no avail. It will finish full t55 tonight - if it does hit I'll alert Ryan but I think he's safe.

Sorry for the confusion.

How much wall-clock time took that C221?

Ryan says according to his logs it took 28 hours.

[QUOTE=swellman;381825]Ryan's results [url=http://www.factordb.com/index.php?query=127%5E81%2B81%5E127]here[/url].[/QUOTE]C159_127_81 looks like GNFS job, not SNFS (difficulty 243).

[QUOTE=XYYXF;383114]C159_127_81 looks like GNFS job, not SNFS (difficulty 243).[/QUOTE]

No he says it was specifically a SNFS job. Ryan used the "snfspoly
helper program" in the xyyxf yahoo group to generate the poly for this number. He even overseived the job the first time and then had to rerun LA with less relations. Which is kind of scary...

Updated: [url]http://xyyxf.at.tut.by/status.html[/url]

:)

Updated: [url]http://xyyxf.at.tut.by/results.html#0[/url]

[QUOTE=swellman;383118]No he says it was specifically a SNFS job. Ryan used the "snfspoly
helper program" in the xyyxf yahoo group to generate the poly for this number. He even overseived the job the first time and then had to rerun LA with less relations. Which is kind of scary...[/QUOTE]

Any idea what parameters to feed that program? I just compiled it and am looking at the source code, but I've no idea.

One feeds snfspoly the degree of the polynomial on the command line (optionaly, by default 5, I usually use 6), then one enters Cnnn_X_Y interactively.

For instance:
[code]$ ~/snfspoly/snfspoly
C159_127_81
Original C159_127_81 contains 243 digits
Y^X=3^508
X^Y=127^81
Y^X=3^508

Poly file:
********
n: <copy from file>
name: C159_127_81
#X^Y=(127^1)*(127^16)^5
#Y^X=(3^3)*(3^101)^5
deg: 5
c5: 27
c0: 127
Y1: 4579937329576774398276408998492161
Y0: -1546132562196033993109383389296863818106322566003
type: snfs
skew: <vary from 1 to 10 and check secs/rel number>
********
1.528302 ratio : C159_127_81 with 243 digits[/code]

[code]$ ~/snfspoly/snfspoly 6
C159_127_81
Original C159_127_81 contains 243 digits
Y^X=3^508
X^Y=127^81
Y^X=3^508

Poly file:
********
n: <copy from file>
name: C159_127_81
#X^Y=(127^3)*(127^13)^6
#Y^X=(3^4)*(3^84)^6
deg: 6
c6: 81
c0: 2048383
Y1: 2235879388560037062539773567
Y0: -11972515182562019788602740026717047105681
type: snfs
skew: <vary from 1 to 10 and check secs/rel number>
********
1.528302 ratio : C159_127_81 with 243 digits[/code]

Nifty! Thanks!

I had a request for a Windows version of snfspoly, so I'm uploading it here. It's 64-bit (built in MinGW-64) compiled with GMP 6.0.0.