YAFU 2.0

[bsquared]

Originally Posted by richs

I sieved an Aliquot C141 using Yafu 2.0 and when the filtering ran, every relation was an error -11. Looking at the .fb file below, somehow Yafu did not include skew, rlim, frmax, famax, srlpmax, or salpmax.

N 379940961516713825613865981760557035526784109230555165792877792447392213895676955608876175676740458184733360391979563490370537264576678836483
A0 17921599049871804734714330370707400
A1 884689986849071910726068107020
A2 1004298442072520798460436
A3 -54583391456339434
A4 -93062625051
A5 9180
R0 -2105596592265349121584460471
R1 1152139905935473

I got it to work by adding skew and the other parameters to the .fb file and running Yafu 1. I'm not sure if this was my error or if Yafu 2.0 did not include the parameters for some odd reason.

None of those parameters are needed for filtering, which is the only place .fb files are used. The .job file is where the ggnfs equivalent to those parameters are filled in, for sieving. I don't know why or how filling those parameters in here would cause it to work, or not, for either version. Usually when tons of -11's happen it's because a previous job didn't get cleared out somehow (power loss, job killed, etc.).

[kotenok2000]

I can't factor 27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093
It freezes on commencing Lanczos iteration (8 threads)
memory use: 71.9 MB
with no cpu usage.
yafu "factor(27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093)" -p -threads 8

also it outputs
line 225 - Failed to obtain a task from the jobs queue.
line 274 - Warning an error has occurred when trying to obtain a worker task.
line 275 - The worker thread has exited.
line 225 - Failed to obtain a task from the jobs queue.
line 274 - Warning an error has occurred when trying to obtain a worker task.
line 275 - The worker thread has exited.
line 225 - Failed to obtain a task from the jobs queue.
line 274 - Warning an error has occurred when trying to obtain a worker task.
line 275 - The worker thread has exited.
line 225 - Failed to obtain a task from the jobs queue.
line 274 - Warning an error has occurred when trying to obtain a worker task.
line 275 - The worker thread has exited.

[James Heinrich]

Originally Posted by kotenok2000

I can't factor(27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093)

factor(27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093)

fac: factoring 27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093
fac: using pretesting plan: deep
fac: using specified qs/gnfs crossover of 100 digits
fac: using specified qs/snfs crossover of 100 digits
div: primes less than 10000
fmt: 1000000 iterations
rho: x^2 + 3, starting 1000 iterations on C101
rho: x^2 + 2, starting 1000 iterations on C101
rho: x^2 + 1, starting 1000 iterations on C101
nfs: searching for brent special forms...
nfs: searching for homogeneous cunningham special forms...
nfs: searching for XYYXF special forms...
nfs: searching for direct special forms...
nfs: snfs form detection took 0.055005 seconds
nfs: couldn't find special form
pm1: starting B1 = 150K, B2 = gmp-ecm default on C101
ecm: 128/32 curves on C101 @ B1=2000, B2=100*B1
ecm: process took 0.0630 seconds.
ecm: 128/80 curves on C101 @ B1=11000, B2=100*B1
ecm: process took 0.1130 seconds.
ecm: 256/224 curves on C101 @ B1=50000, B2=100*B1
ecm: process took 0.8514 seconds.
pm1: starting B1 = 3750K, B2 = gmp-ecm default on C101
ecm: 512/432 curves on C101 @ B1=250000, B2=100*B1
ecm: process took 7.3860 seconds.
pm1: starting B1 = 15M, B2 = gmp-ecm default on C101
ecm: 640/576 curves on C101 @ B1=1000000, B2=100*B1
ecm: process took 34.6520 seconds.
nfs: commencing nfs on c101: 27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093
nfs: searching for brent special forms...
nfs: searching for homogeneous cunningham special forms...
nfs: searching for XYYXF special forms...
nfs: searching for direct special forms...
nfs: snfs form detection took 0.079990 seconds
nfs: couldn't find special form
....
nfs: commencing msieve filtering
27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093
checking relations array at location 1
checking relations array at location 1
checking relations array at location 1
nfs: commencing msieve linear algebra
linear algebra completed 178084 of 179443 dimensions (99.2%, ETA 0h 0m)
nfs: commencing msieve sqrt
NFS elapsed time = 1844.8132 seconds.
Total factoring time = 1895.3412 seconds


***factors found***

P55 = 4009233200275881669007420627248030065788133608728404689
P46 = 6905885536470833185864058916647404865761283437

ans = 1

[bsquared]

Originally Posted by kotenok2000

I can't factor 27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093
It freezes on commencing Lanczos iteration (8 threads)
memory use: 71.9 MB
with no cpu usage.
yafu "factor(27687305570123882468203735526899284256078398738059989078472112075185421896509959250815385106168836093)" -p -threads 8

also it outputs
line 225 - Failed to obtain a task from the jobs queue.
line 274 - Warning an error has occurred when trying to obtain a worker task.
line 275 - The worker thread has exited.
line 225 - Failed to obtain a task from the jobs queue.
line 274 - Warning an error has occurred when trying to obtain a worker task.
line 275 - The worker thread has exited.
line 225 - Failed to obtain a task from the jobs queue.
line 274 - Warning an error has occurred when trying to obtain a worker task.
line 275 - The worker thread has exited.
line 225 - Failed to obtain a task from the jobs queue.
line 274 - Warning an error has occurred when trying to obtain a worker task.
line 275 - The worker thread has exited.

That error comes from inside the msieve library, and I haven't tracked down why it happens or how to fix it yet. Fortunately if you restart the job with the existing data set it should work.

[kotenok2000]

from when did this msieve library error begin to appear and from what commit should i download yafu-x64.exe?