Revision 2.07 appears to be stuck in a loop:

Code:

. . .
starting SIQS on c88: 1072980570200329351188730228988024470047893288038112575153917530948170108341537641314357
70449 relations found: 20728 full + 49721 from 872363 partial
threw away 0 relations with large primes too small
==== sieve params ====
n = 88 digits, 290 bits
factor base: 66560 primes (max prime = 1773997)
single large prime cutoff: 195139670 (110 * pmax)
double large prime range from 3147065356009 to 2173398172298490
DLP MFB = 1.85
using SSE41 enabled 32k sieve core
sieve interval: 12 blocks of size 32768
polynomial A has ~ 11 factors
using multiplier of 1 (kn mod 8 == 5)
using SPV correction of 20 bits, starting at offset 35
trial factoring cutoff at 93 bits
==== sieving in progress ( 24 threads): 66624 relations needed ====
==== Press ctrl-c to abort and save state ====
70449 rels found: 20728 full + 49721 from 872363 partial, (1592093.11 rels/sec)
sieving required 0 total polynomials (4294967295 'A' polynomials)
trial division touched 0 sieve locations out of 0
dlp-ecm: 0 failures, 0 attempts, 0 outside range, 0 prp, 0 useful
total reports = 0, total surviving reports = 0
total blocks sieved = 0, avg surviving reports per block = -nan
Elapsed time: 0.5610 sec
QS elapsed time = 0.5611 seconds.
==== post processing stage (msieve-1.38) ====
read 893090 relations
begin singleton removal with 893090 relations
reduce to 162769 relations in 9 passes
attempting to read and process 162769 relations
recovered 162769 relations
recovered 129773 polynomials
attempting to build 70448 cycles
found 70448 cycles from 162769 relations in 5 passes
distribution of cycle lengths:
length 1 : 20728
length 2 : 15380
length 3 : 12812
length 4 : 8869
length 5 : 5644
length 6 : 3303
length 7 : 1814
length 9+: 1898
largest cycle: 18 relations
matrix is 66560 x 70448 (16.6 MB) with weight 3794245 (53.86/col)
sparse part has weight 3794245 (53.86/col)
filtering completed in 4 passes
matrix is 59263 x 59327 (13.3 MB) with weight 3021409 (50.93/col)
sparse part has weight 3021409 (50.93/col)
saving the first 48 matrix rows for later
matrix is 59215 x 59327 (11.6 MB) with weight 2672491 (45.05/col)
sparse part has weight 2454774 (41.38/col)
matrix includes 64 packed rows
using block size 23730 for processor cache size 15360 kB
commencing Lanczos iteration
memory use: 9.5 MB
lanczos halted after 938 iterations (dim = 59210)
recovered 14 nontrivial dependencies
Lanczos elapsed time = 14.3076 seconds.
Sqrt elapsed time = 1.3032 seconds.
SIQS elapsed time = 16.1745 seconds.
pretesting / qs ratio was 0.90
fac: check tune params contained invalid parameter(s), ignoring tune info.
fac: setting target pretesting digits to 27.08
t15: 67.74
t20: 29.98
t25: 4.05
t30: 0.42
t35: 0.03
fac: estimated sum of completed work is t27.08
starting SIQS on c88: 1072980570200329351188730228988024470047893288038112575153917530948170108341537641314357
70449 relations found: 20728 full + 49721 from 872363 partial
threw away 0 relations with large primes too small
==== sieve params ====
n = 88 digits, 290 bits
factor base: 66560 primes (max prime = 1773997)
single large prime cutoff: 195139670 (110 * pmax)
double large prime range from 3147065356009 to 2173398172298490
DLP MFB = 1.85
using SSE41 enabled 32k sieve core
sieve interval: 12 blocks of size 32768
polynomial A has ~ 11 factors
using multiplier of 1 (kn mod 8 == 5)
using SPV correction of 20 bits, starting at offset 35
trial factoring cutoff at 93 bits
==== sieving in progress ( 24 threads): 66624 relations needed ====
==== Press ctrl-c to abort and save state ====
70449 rels found: 20728 full + 49721 from 872363 partial, (1348970.02 rels/sec)
sieving required 0 total polynomials (4294967295 'A' polynomials)
trial division touched 0 sieve locations out of 0
dlp-ecm: 0 failures, 0 attempts, 0 outside range, 0 prp, 0 useful
total reports = 0, total surviving reports = 0
total blocks sieved = 0, avg surviving reports per block = -nan
Elapsed time: 0.6621 sec
QS elapsed time = 0.6622 seconds.
==== post processing stage (msieve-1.38) ====
read 893090 relations
begin singleton removal with 893090 relations
reduce to 162769 relations in 9 passes
attempting to read and process 162769 relations
recovered 162769 relations
recovered 129773 polynomials
attempting to build 70448 cycles
found 70448 cycles from 162769 relations in 5 passes
distribution of cycle lengths:
length 1 : 20728
length 2 : 15380
length 3 : 12812
length 4 : 8869
length 5 : 5644
length 6 : 3303
length 7 : 1814
length 9+: 1898
largest cycle: 18 relations
matrix is 66560 x 70448 (16.6 MB) with weight 3794245 (53.86/col)
sparse part has weight 3794245 (53.86/col)
filtering completed in 4 passes
matrix is 59263 x 59327 (13.3 MB) with weight 3021409 (50.93/col)
sparse part has weight 3021409 (50.93/col)
saving the first 48 matrix rows for later
matrix is 59215 x 59327 (11.6 MB) with weight 2672491 (45.05/col)
sparse part has weight 2454774 (41.38/col)
matrix includes 64 packed rows
using block size 23730 for processor cache size 15360 kB
commencing Lanczos iteration
memory use: 9.5 MB
lanczos halted after 938 iterations (dim = 59210)
recovered 14 nontrivial dependencies
Lanczos elapsed time = 13.7053 seconds.
Sqrt elapsed time = 1.0454 seconds.
SIQS elapsed time = 15.4167 seconds.
pretesting / qs ratio was 0.94
fac: check tune params contained invalid parameter(s), ignoring tune info.
fac: setting target pretesting digits to 27.08
t15: 67.74
t20: 29.98
t25: 4.05
t30: 0.42
t35: 0.03
fac: estimated sum of completed work is t27.08
starting SIQS on c88: 1072980570200329351188730228988024470047893288038112575153917530948170108341537641314357
70449 relations found: 20728 full + 49721 from 872363 partial
threw away 0 relations with large primes too small
==== sieve params ====
n = 88 digits, 290 bits
factor base: 66560 primes (max prime = 1773997)
single large prime cutoff: 195139670 (110 * pmax)
double large prime range from 3147065356009 to 2173398172298490
DLP MFB = 1.85
using SSE41 enabled 32k sieve core
sieve interval: 12 blocks of size 32768
polynomial A has ~ 11 factors
using multiplier of 1 (kn mod 8 == 5)
using SPV correction of 20 bits, starting at offset 35
trial factoring cutoff at 93 bits
==== sieving in progress ( 24 threads): 66624 relations needed ====
==== Press ctrl-c to abort and save state ====
70449 rels found: 20728 full + 49721 from 872363 partial, (1616530.37 rels/sec)
sieving required 0 total polynomials (4294967295 'A' polynomials)
trial division touched 0 sieve locations out of 0
dlp-ecm: 0 failures, 0 attempts, 0 outside range, 0 prp, 0 useful
total reports = 0, total surviving reports = 0
total blocks sieved = 0, avg surviving reports per block = -nan
Elapsed time: 0.5525 sec
QS elapsed time = 0.5526 seconds.
==== post processing stage (msieve-1.38) ====
read 893090 relations
begin singleton removal with 893090 relations
reduce to 162769 relations in 9 passes
attempting to read and process 162769 relations
recovered 162769 relations
recovered 129773 polynomials
attempting to build 70448 cycles
found 70448 cycles from 162769 relations in 5 passes
distribution of cycle lengths:
length 1 : 20728
length 2 : 15380
length 3 : 12812
length 4 : 8869
length 5 : 5644
length 6 : 3303
length 7 : 1814
length 9+: 1898
largest cycle: 18 relations
matrix is 66560 x 70448 (16.6 MB) with weight 3794245 (53.86/col)
sparse part has weight 3794245 (53.86/col)
filtering completed in 4 passes
matrix is 59263 x 59327 (13.3 MB) with weight 3021409 (50.93/col)
sparse part has weight 3021409 (50.93/col)
saving the first 48 matrix rows for later
matrix is 59215 x 59327 (11.6 MB) with weight 2672491 (45.05/col)
sparse part has weight 2454774 (41.38/col)
matrix includes 64 packed rows
using block size 23730 for processor cache size 15360 kB
commencing Lanczos iteration
memory use: 9.5 MB
lanczos halted after 938 iterations (dim = 59210)
recovered 14 nontrivial dependencies
Lanczos elapsed time = 13.9592 seconds.
Sqrt elapsed time = 1.0246 seconds.
SIQS elapsed time = 15.5372 seconds.
pretesting / qs ratio was 0.93
fac: check tune params contained invalid parameter(s), ignoring tune info.
fac: setting target pretesting digits to 27.08
t15: 67.74
t20: 29.98
t25: 4.05
t30: 0.42
t35: 0.03
fac: estimated sum of completed work is t27.08
. . .

Edit: This is occurring on 2 of 6 machines.