Stderr output

<core_client_version>7.24.1</core_client_version>
<![CDATA[
<message>
process exited with code 195 (0xc3, -61)</message>
<stderr_txt>
2026-06-29 12:55:43 (2292): wrapper (7.24.26018): starting
2026-06-29 12:55:43 (2292): wrapper (7.24.26018): starting
2026-06-29 12:55:43 (2292): wrapper: running ./mfakto (-d 0)
2026-06-29 12:55:43 (2292): wrapper: created child process 2294
mfakto 0.16.0-beta.5 (64-bit build)


Runtime options
  INI file                  mfakto.ini
  Verbosity                 1
  SieveOnGPU                yes
  MoreClasses               yes
  GPUSievePrimes            81157
  GPUSieveProcessSize       24 Kib
  GPUSieveSize              96 Mib
  FlushInterval             0
  WorkFile                  worktodo.txt
  ResultsFile               results.txt
  JSONResultsFile           results.json.txt
  LogFile                   mfakto.log
  Checkpoints               enabled
  CheckpointDelay           60 s
  Stages                    disabled
  StopAfterFactor           bit level
  PrintMode                 compact
  Logging                   disabled
  V5UserID                  none
  ComputerID                none
  TimeStampInResults        yes
  LegacyResultsTxt          no
  VectorSize                2
  GPUType                   AUTO
  UseBinfile                mfakto_Kernels.elf

Compile-time options

Select device - Get device info:
Warning: Unknown GPU name, assuming a GCN (Graphics Core Next) device. Please
      post the name to the GIMPS forum or GitHub to have it added to mfakto.

      Device name:   AMD Radeon RX 6900 XT (radeonsi, navi21, LLVM 20.1.2, DRM 3.64, 7.0.0-14-generic) (AMD)
      mfakto thread: https://www.mersenneforum.org/node/11037
      GitHub:        https://github.com/primesearch/mfakto/issues

      You can also set GPUType in mfakto.ini to avoid this message.

OpenCL device info
  name                      AMD Radeon RX 6900 XT (radeonsi, navi21, LLVM 20.1.2, DRM 3.64, 7.0.0-14-generic) (AMD)
  device (driver) version   OpenCL 3.0  (25.2.8-0ubuntu0.24.04.2)
  maximum threads per block 1024
  maximum threads per grid  1073741824
  number of multiprocessors 80 (5120 compute elements)
  clock rate                2660 MHz

Automatic parameters
  threads per grid          0
  optimizing kernels for    GCN

Compiling kernels.
  GPUSievePrimes (adjusted) 81206
  GPUsieve minimum exponent 1037054
Started a simple self-test ...
######### test case 1/30 (M1031831[63-64]) #########
ERROR: self-test failed for M1031831 (cl_barrett15_69_gs)     
  no factor found
######### test case 2/30 (M51332417[68-69]) #########
ERROR: self-test failed for M51332417 (cl_barrett15_69_gs)     
  no factor found
######### test case 3/30 (M50896831[69-70]) #########
ERROR: self-test failed for M50896831 (cl_barrett15_71_gs)     
  no factor found
######### test case 4/30 (M50979079[70-71]) #########
ERROR: self-test failed for M50979079 (cl_barrett15_73_gs)     
  no factor found
######### test case 5/30 (M51232133[71-72]) #########
ERROR: self-test failed for M51232133 (cl_barrett15_73_gs)     
  no factor found
######### test case 6/30 (M50830523[71-72]) #########
ERROR: self-test failed for M50830523 (cl_barrett15_73_gs)     
  no factor found
######### test case 7/30 (M50752613[72-73]) #########
ERROR: self-test failed for M50752613 (cl_barrett15_73_gs)     
  no factor found
######### test case 8/30 (M51507913[72-73]) #########
ERROR: self-test failed for M51507913 (cl_barrett15_73_gs)     
  no factor found
######### test case 9/30 (M51916901[73-74]) #########
ERROR: self-test failed for M51916901 (cl_barrett15_74_gs)     
  no factor found
######### test case 10/30 (M51157933[74-75]) #########
ERROR: self-test failed for M51157933 (cl_barrett15_82_gs)     
  no factor found
######### test case 11/30 (M51308501[75-76]) #########
ERROR: self-test failed for M51308501 (cl_barrett15_82_gs)     
  no factor found
######### test case 12/30 (M51671491[75-76]) #########
ERROR: self-test failed for M51671491 (cl_barrett15_82_gs)     
  no factor found
######### test case 13/30 (M50805581[77-78]) #########
ERROR: self-test failed for M50805581 (cl_barrett15_82_gs)     
  no factor found
######### test case 14/30 (M51157429[78-79]) #########
ERROR: self-test failed for M51157429 (cl_barrett15_82_gs)     
  no factor found
######### test case 15/30 (M51406151[78-79]) #########
ERROR: self-test failed for M51406151 (cl_barrett15_82_gs)     
  no factor found
######### test case 16/30 (M51478381[79-80]) #########
ERROR: self-test failed for M51478381 (cl_barrett15_82_gs)     
  no factor found
######### test case 17/30 (M51350527[80-81]) #########
ERROR: self-test failed for M51350527 (cl_barrett15_82_gs)     
  no factor found
######### test case 18/30 (M53061139[80-81]) #########
ERROR: self-test failed for M53061139 (cl_barrett15_82_gs)     
  no factor found
######### test case 19/30 (M48629519[81-82]) #########
ERROR: self-test failed for M48629519 (cl_barrett15_83_gs)     
  no factor found
######### test case 20/30 (M51752893[83-84]) #########
######### test case 21/30 (M51760133[83-84]) #########
######### test case 22/30 (M51090757[84-85]) #########
######### test case 23/30 (M51050171[84-85]) #########
######### test case 24/30 (M50989481[86-87]) #########
######### test case 25/30 (M50856937[86-87]) #########
######### test case 26/30 (M53065231[88-89]) #########
######### test case 27/30 (M3321929777[63-64]) #########
ERROR: self-test failed for M3321929777 (cl_barrett15_69_gs)     
  no factor found
######### test case 28/30 (M3321930841[63-64]) #########
ERROR: self-test failed for M3321930841 (cl_barrett15_69_gs)     
  no factor found
######### test case 29/30 (M55069117[64-65]) #########
ERROR: self-test failed for M55069117 (cl_barrett15_69_gs)     
  no factor found
######### test case 30/30 (M45448679[81-82]) #########
ERROR: self-test failed for M45448679 (cl_barrett15_83_gs)     
  no factor found

Self-test statistics
  number of tests           30
  successful tests          7
  no factor found           23

self-test FAILED!

2026-06-29 12:55:45 (2292): ./mfakto exited; CPU time 0.696875
2026-06-29 12:55:45 (2292): app exit status: 0x4
2026-06-29 12:55:45 (2292): called boinc_finish(195)

</stderr_txt>
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