I've queued L1397 for 15e; could I interest anyone in polynomial selection for the C171 cofactor of Fib(2145)? Probably deserves about a week on a GTX580-class GPU.

[QUOTE=wblipp;412985]The C157 from [URL="http://factordb.com/index.php?id=1100000000438761240"]P180+1 [/URL]needs a polynomial.
Yoyo@home has completed ECM to 1/3 of the size.[/QUOTE]

I took A5 to 6M. The best I found is:
[CODE]N: 4545206781176853029322722471760270567799958255181386536930920727048938332070369338953125329433305547240481534440829379440535658858929717305795353745937941621
# expecting poly E from 2.00e-12 to > 2.30e-12
R0: -1632567867063590182416876816843
R1: 2116530096533083
A0: -10090026927779638685868075194342979440
A1: 133499417153007062388650701966998
A2: 23850984876463818226503783
A3: -15516133197620197422
A4: -1280606808592
A5: 391920
# skew 4125117.07, size 3.057e-15, alpha -6.920, combined = 2.191e-12 rroots = 5[/CODE]

I'll do the C154 next.

Edit: I mean C155.

[QUOTE=wblipp;412985]The C155 from [URL="http://factordb.com/index.php?id=1100000000438763094"]P231+1[/URL] needs a polynomial.
Yoyo@home has completed ECM to 1/3 of the size.[/QUOTE]

I took A5 to 7M. The best I found is:
[CODE]N: 53809318947498920119013718326354144850351745967141380111988316195832961905924522359115807833595439644724421989436720295091695896111925572414263785270873289
# expecting poly E from 2.62e-12 to > 3.01e-12
R0: -654468512970011394951354858038
R1: 247183871139257
A0: 4411040416796572883803200639857361345
A1: 5327747613116870926320102908838
A2: -1932001108416812421260637
A3: -3058518414122516104
A4: -257054184862
A5: 448140
# skew 1932973.18, size 4.593e-15, alpha -6.127, combined = 2.800e-12 rroots = 3[/CODE]

[QUOTE=fivemack;413119]I've queued L1397 for 15e; could I interest anyone in polynomial selection for the C171 cofactor of Fib(2145)? Probably deserves about a week on a GTX580-class GPU.[/QUOTE]

The C171 is found [URL="http://www.factordb.com/index.php?id=1100000000080333083"]here[/URL].

The default values for polynomial selection on my system are:
[CODE]polynomial degree: 5
max stage 1 norm: 5.66e+25
max stage 2 norm: 1.79e+24
min E-value: 1.46e-13
poly select deadline: 1079999
time limit set to 300.00 CPU-hours
expecting poly E from 2.96e-13 to > 3.40e-13
searching leading coefficients from 1 to 109676063
using GPU 0 (GeForce GTX 560 Ti)
selected card has CUDA arch 2.1[/CODE]

What would be the GPU values for this size number?
I'm guessing,
stage1_norm=5e24 (or 4e24)
stage2_norm=8e23

[QUOTE=RichD;413358]The C171 is found [URL="http://www.factordb.com/index.php?id=1100000000080333083"]here[/URL].

The default values for polynomial selection on my system are:
[CODE]polynomial degree: 5
max stage 1 norm: 5.66e+25
max stage 2 norm: 1.79e+24
min E-value: 1.46e-13
poly select deadline: 1079999
time limit set to 300.00 CPU-hours
expecting poly E from 2.96e-13 to > 3.40e-13
searching leading coefficients from 1 to 109676063
using GPU 0 (GeForce GTX 560 Ti)
selected card has CUDA arch 2.1[/CODE]

What would be the GPU values for this size number?
I'm guessing,
stage1_norm=5e24 (or 4e24)
stage2_norm=8e23[/QUOTE]

I would use stage1 as you selected, and stage2 of 3e22 or 2.5e22. I try to generate about 100 hits/day from the -nps step.

C171 of Fib(2145)
 

[QUOTE=fivemack;413119]could I interest anyone in polynomial selection for the C171 cofactor of Fib(2145)? [/QUOTE]

I'll start with A5 up to 5M to see how long it takes me.

[QUOTE=VBCurtis;413378]I would use stage1 as you selected, and stage2 of 3e22 or 2.5e22. I try to generate about 100 hits/day from the -nps step.[/QUOTE]

Whoops! I divided *your* stage2 value by 20-25, rather than the default. 1.8e24 / 25 is about 7e22. Mea culpa.

C171 of Fib(2145)
 

Oh, I meant to say 8e22.

Through 5M the following is found but I'm sure something better will show up.
[CODE]# expecting poly E from 2.96e-13 to > 3.40e-13

# skew 30185283.23, size 1.056e-16, alpha -7.610, combined = 2.906e-13 rroots = 5[/CODE]

Continuing to 12M.

[QUOTE=wblipp;413091]Thanks. That's beyond the 14e range.

Is there some heuristic you used to determine that?[/QUOTE]

Compute the norms one gets with the proposed polynomial. (with its large coefficients)
Compute the norms of a C289 with (say) single digit coefficients.....

C171 of Fib(2145)
 

Through 12M. A baseline to beat.
Continuing to 20M.
[CODE]N: 221137385761176470179068837936593557547190252556073792358496234923434000002326676515190691253261000857513488598830939165918628240988251126058808226547851029007517793628341
# expecting poly E from 2.96e-13 to > 3.40e-13
R0: -464565564075064507061751828783921
R1: 4978508000455657
A0: -10616567228036709201253613581731132563168
A1: 55979012506607208841809066584294460
A2: -13904632680941386837724795876
A3: -1400811474901373930373
A4: 174324589714306
A5: 10219440
# skew 8226944.08, size 1.108e-16, alpha -7.511, combined = 3.022e-13 rroots = 5[/CODE]

C171 of Fib(2145)
 

Nothing better through 20M.
Continuing to 30M.