Recently I got a task related to this work unit. It's already running here without any interruptions for more than 53 hours and it will be past deadline soon. What is interesting here is the history of this work unit: first it was running for about 21 hours and somebody aborted it, next when it was assigned again it was never returned (possibly not finished before deadline) and finally I got it and it doesn't want to end within reasonable time.

What is even more odd that it behaves differently than other Yafu tasks. This is "8t" group task, so when running it should spawn 8 child processes (each of them assigned to different CPU core), next all of them should quit one after another, then another 8 processes will be launched etc. But here I can see there is only one child process running which is using 100 % of one CPU core and that's all.

Here is the task visible in BoincTasks, while here is the wrapper and only child process (with command line showing as a hint) visible in Process Explorer.

Also here are contents of factor.log (after running for so much time I would expect a lot more of "commencing lattice sieving" lines):

01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, 
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, ****************************
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, Starting factorization of 1903288528731676902750455535196312759858138201174732473776222460746990038786332614029501321612092971695626431723138798538440766038093
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, using pretesting plan: normal
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, no tune info: using qs/gnfs crossover of 95 digits
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, ****************************
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, rho: x^2 + 3, starting 1000 iterations on C133
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, rho: x^2 + 2, starting 1000 iterations on C133
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, rho: x^2 + 1, starting 1000 iterations on C133
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, pm1: starting B1 = 150K, B2 = gmp-ecm default on C133
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, current ECM pretesting depth: 0.00
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, scheduled 30 curves at B1=2000 toward target pretesting depth of 40.92
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, Finished 30 curves using Lenstra ECM method on C133 input, B1=2K, B2=gmp-ecm default
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, current ECM pretesting depth: 15.18
01/20/24 01:03:05 v1.34.5 @ AIONEL_CRUNCHER, scheduled 74 curves at B1=11000 toward target pretesting depth of 40.92
01/20/24 01:03:08 v1.34.5 @ AIONEL_CRUNCHER, Finished 74 curves using Lenstra ECM method on C133 input, B1=11K, B2=gmp-ecm default
01/20/24 01:03:08 v1.34.5 @ AIONEL_CRUNCHER, current ECM pretesting depth: 20.24
01/20/24 01:03:08 v1.34.5 @ AIONEL_CRUNCHER, scheduled 214 curves at B1=50000 toward target pretesting depth of 40.92
01/20/24 01:03:14 v1.34.5 @ AIONEL_CRUNCHER, Finished 216 curves using Lenstra ECM method on C133 input, B1=50K, B2=gmp-ecm default
01/20/24 01:03:14 v1.34.5 @ AIONEL_CRUNCHER, pm1: starting B1 = 3750K, B2 = gmp-ecm default on C133
01/20/24 01:03:15 v1.34.5 @ AIONEL_CRUNCHER, current ECM pretesting depth: 25.34
01/20/24 01:03:15 v1.34.5 @ AIONEL_CRUNCHER, scheduled 430 curves at B1=250000 toward target pretesting depth of 40.92
01/20/24 01:04:06 v1.34.5 @ AIONEL_CRUNCHER, Finished 432 curves using Lenstra ECM method on C133 input, B1=250K, B2=gmp-ecm default
01/20/24 01:04:06 v1.34.5 @ AIONEL_CRUNCHER, pm1: starting B1 = 15M, B2 = gmp-ecm default on C133
01/20/24 01:04:10 v1.34.5 @ AIONEL_CRUNCHER, current ECM pretesting depth: 30.46
01/20/24 01:04:10 v1.34.5 @ AIONEL_CRUNCHER, scheduled 904 curves at B1=1000000 toward target pretesting depth of 40.92
01/20/24 01:11:01 v1.34.5 @ AIONEL_CRUNCHER, Finished 904 curves using Lenstra ECM method on C133 input, B1=1M, B2=gmp-ecm default
01/20/24 01:11:01 v1.34.5 @ AIONEL_CRUNCHER, current ECM pretesting depth: 35.56
01/20/24 01:11:01 v1.34.5 @ AIONEL_CRUNCHER, scheduled 2350 curves at B1=3000000 toward target pretesting depth of 40.92
01/20/24 01:59:08 v1.34.5 @ AIONEL_CRUNCHER, Finished 2352 curves using Lenstra ECM method on C133 input, B1=3M, B2=gmp-ecm default
01/20/24 01:59:08 v1.34.5 @ AIONEL_CRUNCHER, current ECM pretesting depth: 40.63
01/20/24 01:59:08 v1.34.5 @ AIONEL_CRUNCHER, scheduled 264 curves at B1=11000000 toward target pretesting depth of 40.92
01/20/24 02:17:24 v1.34.5 @ AIONEL_CRUNCHER, Finished 264 curves using Lenstra ECM method on C133 input, B1=11M, B2=gmp-ecm default
01/20/24 02:17:24 v1.34.5 @ AIONEL_CRUNCHER, final ECM pretested depth: 40.92
01/20/24 02:17:24 v1.34.5 @ AIONEL_CRUNCHER, scheduler: switching to sieve method
01/20/24 02:17:24 v1.34.5 @ AIONEL_CRUNCHER, nfs: commencing nfs on c133: 1903288528731676902750455535196312759858138201174732473776222460746990038786332614029501321612092971695626431723138798538440766038093
01/20/24 02:17:24 v1.34.5 @ AIONEL_CRUNCHER, nfs: commencing poly selection with 8 threads
01/20/24 02:17:24 v1.34.5 @ AIONEL_CRUNCHER, nfs: setting deadline of 10350 seconds
01/20/24 05:18:17 v1.34.5 @ AIONEL_CRUNCHER, nfs: completed 29 ranges of size 250 in 10852.8990 seconds
01/20/24 05:18:17 v1.34.5 @ AIONEL_CRUNCHER, nfs: best poly = # norm 1.177313e-012 alpha -5.984018 e 6.057e-011 rroots 5
01/20/24 05:18:17 v1.34.5 @ AIONEL_CRUNCHER, nfs: commencing lattice sieving with 8 threads
01/20/24 05:43:33 v1.34.5 @ AIONEL_CRUNCHER, nfs: commencing lattice sieving with 8 threads
01/20/24 06:13:53 v1.34.5 @ AIONEL_CRUNCHER, nfs: commencing lattice sieving with 8 threads
01/20/24 06:43:50 v1.34.5 @ AIONEL_CRUNCHER, nfs: commencing lattice sieving with 8 threads