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Hi,
I just noticed that when I use the latest "gfnsvocl_w64_2G.exe" app with the current Cygwin + bash on Windows 10 64 bit (1709), there is a problem with CTRL+C. If you restart the app, despite the checkpoint file, you will find some double entries in the result file:
mcw@dagobert /cygdrive/c/Users/mcw/Desktop/sieve
$ ls -al
insgesamt 144
drwx------+ 1 mcw Kein 0 18. Mrz 15:35 .
drwxrwx---+ 1 mcw Kein 0 18. Mrz 16:09 ..
-rwx------+ 1 mcw Kein 137216 15. Jan 20:48 ocl_w64_2G.exe
mcw@dagobert /cygdrive/c/Users/mcw/Desktop/sieve
$ ./ocl_w64_2G.exe 18 91483 91488 B12
GFNSvCUDA+ v0.7.1 (c) 2015 Anand Nair (anand.s.nair AT gmail)
OpenCL port by Roman Trunov (stream AT proxyma ru)
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
Using factor file 'f18_91483P_91488P.txt'
Using checkpoint file 'c18_91483P_91488P.txt'
Found OCL platform "AMD Accelerated Parallel Processing" by "Advanced Micro Devices, Inc."
GPU devices on platform: 0
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 1
Found OCL platform "Intel(R) OpenCL" by "Intel(R) Corporation"
GPU devices on platform: 1
D0: "GeForce GTX 970"
D1: "Intel(R) HD Graphics 610"
Using 79 bit core.
91483000763856715777 | 821639908^262144+1
91483012664942657537 | 1181562520^262144+1
91483017290328309761 | 1327778384^262144+1
91483017741184008193 | 1725107092^262144+1
91483016963236036609 87381.3/s (91.0P/day) Found 2 ETA 1h18m
<- CTRL+C pressed
mcw@dagobert /cygdrive/c/Users/mcw/Desktop/sieve
$ ls -al
insgesamt 146
drwx------+ 1 mcw Kein 0 27. Mrz 16:46 .
drwxrwx---+ 1 mcw Kein 0 18. Mrz 16:09 ..
-rwx------+ 1 mcw Kein 15 27. Mrz 16:46 c18_91483P_91488P.txt
-rwx------+ 1 mcw Kein 226 27. Mrz 16:46 f18_91483P_91488P.txt
-rwx------+ 1 mcw Kein 137216 15. Jan 20:48 ocl_w64_2G.exe
mcw@dagobert /cygdrive/c/Users/mcw/Desktop/sieve
$ cat c18_91483P_91488P.txt
174489975727905
mcw@dagobert /cygdrive/c/Users/mcw/Desktop/sieve
$ ./ocl_w64_2G.exe 18 91483 91488 B12
GFNSvCUDA+ v0.7.1 (c) 2015 Anand Nair (anand.s.nair AT gmail)
OpenCL port by Roman Trunov (stream AT proxyma ru)
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
Using factor file 'f18_91483P_91488P.txt'
Using checkpoint file 'c18_91483P_91488P.txt'
Resuming from checkpoint value 91483000394431856641
Found OCL platform "AMD Accelerated Parallel Processing" by "Advanced Micro Devices, Inc."
GPU devices on platform: 0
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 1
Found OCL platform "Intel(R) OpenCL" by "Intel(R) Corporation"
GPU devices on platform: 1
D0: "GeForce GTX 970"
D1: "Intel(R) HD Graphics 610"
Using 79 bit core.
91483000763856715777 | 821639908^262144+1
91483012664942657537 | 1181562520^262144+1
91483017290328309761 | 1327778384^262144+1
91483017741184008193 | 1725107092^262144+1
91483017359941697537 87797.6/s (91.4P/day) Found 3 ETA 1h18m
<- CTRL+C pressed
mcw@dagobert /cygdrive/c/Users/mcw/Desktop/sieve
$ ls -al
insgesamt 146
drwx------+ 1 mcw Kein 0 27. Mrz 16:46 .
drwxrwx---+ 1 mcw Kein 0 18. Mrz 16:09 ..
-rwx------+ 1 mcw Kein 15 27. Mrz 16:47 c18_91483P_91488P.txt
-rwx------+ 1 mcw Kein 401 27. Mrz 16:47 f18_91483P_91488P.txt
-rwx------+ 1 mcw Kein 137216 15. Jan 20:48 ocl_w64_2G.exe
And now you see the double entries:
mcw@dagobert /cygdrive/c/Users/mcw/Desktop/sieve
$ cat f18_91483P_91488P.txt
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
91483000763856715777 | 821639908^262144+1
91483012664942657537 | 1181562520^262144+1
91483017290328309761 | 1327778384^262144+1
91483017741184008193 | 1725107092^262144+1
91483000763856715777 | 821639908^262144+1
91483012664942657537 | 1181562520^262144+1
91483017290328309761 | 1327778384^262144+1
91483017741184008193 | 1725107092^262144+1
mcw@dagobert /cygdrive/c/Users/mcw/Desktop/sieve
$
This behaviour does not occur when I use CMD.EXE:
C:\Users\mcw\Desktop\sieve>dir
Volume in Laufwerk C: hat keine Bezeichnung.
Volumeseriennummer: 645D-122D
Verzeichnis von C:\Users\mcw\Desktop\sieve
27.03.2018 17:01 <DIR> .
27.03.2018 17:01 <DIR> ..
15.01.2018 21:48 137.216 ocl_w64_2G.exe
1 Datei(en), 137.216 Bytes
2 Verzeichnis(se), 145.678.970.880 Bytes frei
C:\Users\mcw\Desktop\sieve>ocl_w64_2G.exe 18 91483 91488 B12
GFNSvCUDA+ v0.7.1 (c) 2015 Anand Nair (anand.s.nair AT gmail)
OpenCL port by Roman Trunov (stream AT proxyma ru)
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
Using factor file 'f18_91483P_91488P.txt'
Using checkpoint file 'c18_91483P_91488P.txt'
Found OCL platform "AMD Accelerated Parallel Processing" by "Advanced Micro Devices, Inc."
GPU devices on platform: 0
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 1
Found OCL platform "Intel(R) OpenCL" by "Intel(R) Corporation"
GPU devices on platform: 1
D0: "GeForce GTX 970"
D1: "Intel(R) HD Graphics 610"
Using 79 bit core.
91483000763856715777 | 821639908^262144+1
91483012664942657537 | 1181562520^262144+1
91483017290328309761 | 1327778384^262144+1
91483017741184008193 | 1725107092^262144+1
91483034910712135681 | 35354860^262144+1
91483038856307015681 | 1656806252^262144+1
91483039862987161601 87381.3/s (91.0P/day) Found 6 ETA 1h18m
Termination requested
91483043018746888193 87381.3/s (91.0P/day) Found 6 ETA 1h18m
<- CTRL+C pressed
C:\Users\mcw\Desktop\sieve>dir
Volume in Laufwerk C: hat keine Bezeichnung.
Volumeseriennummer: 645D-122D
Verzeichnis von C:\Users\mcw\Desktop\sieve
27.03.2018 17:02 <DIR> .
27.03.2018 17:02 <DIR> ..
27.03.2018 17:03 15 c18_91483P_91488P.txt
27.03.2018 17:02 312 f18_91483P_91488P.txt
15.01.2018 21:48 137.216 ocl_w64_2G.exe
3 Datei(en), 137.543 Bytes
2 Verzeichnis(se), 145.679.269.888 Bytes frei
C:\Users\mcw\Desktop\sieve>type c18_91483P_91488P.txt
174490057027335
C:\Users\mcw\Desktop\sieve>type f18_91483P_91488P.txt
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
91483000763856715777 | 821639908^262144+1
91483012664942657537 | 1181562520^262144+1
91483017290328309761 | 1327778384^262144+1
91483017741184008193 | 1725107092^262144+1
91483034910712135681 | 35354860^262144+1
91483038856307015681 | 1656806252^262144+1
C:\Users\mcw\Desktop\sieve>ocl_w64_2G.exe 18 91483 91488 B12
GFNSvCUDA+ v0.7.1 (c) 2015 Anand Nair (anand.s.nair AT gmail)
OpenCL port by Roman Trunov (stream AT proxyma ru)
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
Using factor file 'f18_91483P_91488P.txt'
Using checkpoint file 'c18_91483P_91488P.txt'
Resuming from checkpoint value 91483043018747412481
Found OCL platform "AMD Accelerated Parallel Processing" by "Advanced Micro Devices, Inc."
GPU devices on platform: 0
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 1
Found OCL platform "Intel(R) OpenCL" by "Intel(R) Corporation"
GPU devices on platform: 1
D0: "GeForce GTX 970"
D1: "Intel(R) HD Graphics 610"
Using 79 bit core.
91483046085517639681 | 1101324452^262144+1
91483048858065829889 | 1230460700^262144+1
91483050224393912321 | 1493028414^262144+1
91483055143844315137 | 1769064358^262144+1
91483058338980167681 | 477873178^262144+1
91483056042833084417 86946.6/s (90.5P/day) Found 4 ETA 1h18m
Termination requested
<- CTRL+C pressed
C:\Users\mcw\Desktop\sieve>type f18_91483P_91488P.txt
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
91483000763856715777 | 821639908^262144+1
91483012664942657537 | 1181562520^262144+1
91483017290328309761 | 1327778384^262144+1
91483017741184008193 | 1725107092^262144+1
91483034910712135681 | 35354860^262144+1
91483038856307015681 | 1656806252^262144+1
91483046085517639681 | 1101324452^262144+1
91483048858065829889 | 1230460700^262144+1
91483050224393912321 | 1493028414^262144+1
91483055143844315137 | 1769064358^262144+1
91483058338980167681 | 477873178^262144+1
C:\Users\mcw\Desktop\sieve>ocl_w64_2G.exe 18 91483 91488 B12
GFNSvCUDA+ v0.7.1 (c) 2015 Anand Nair (anand.s.nair AT gmail)
OpenCL port by Roman Trunov (stream AT proxyma ru)
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
Using factor file 'f18_91483P_91488P.txt'
Using checkpoint file 'c18_91483P_91488P.txt'
Resuming from checkpoint value 91483058805401452545
Found OCL platform "AMD Accelerated Parallel Processing" by "Advanced Micro Devices, Inc."
GPU devices on platform: 0
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 1
Found OCL platform "Intel(R) OpenCL" by "Intel(R) Corporation"
GPU devices on platform: 1
D0: "GeForce GTX 970"
D1: "Intel(R) HD Graphics 610"
Using 79 bit core.
91483064750573617153 | 1356201550^262144+1
91483082985882255361 | 1498244334^262144+1
91483084423112949761 | 479758486^262144+1
91483084930536701953 | 1780915770^262144+1
91483084871849476097 86487.6/s (90.0P/day) Found 3 ETA 1h18m
Termination requested
<- CTRL+C pressed
C:\Users\mcw\Desktop\sieve>ocl_w64_2G.exe 18 91483 91488 B12
GFNSvCUDA+ v0.7.1 (c) 2015 Anand Nair (anand.s.nair AT gmail)
OpenCL port by Roman Trunov (stream AT proxyma ru)
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
Using factor file 'f18_91483P_91488P.txt'
Using checkpoint file 'c18_91483P_91488P.txt'
Resuming from checkpoint value 91483087626457579521
Found OCL platform "AMD Accelerated Parallel Processing" by "Advanced Micro Devices, Inc."
GPU devices on platform: 0
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 1
Found OCL platform "Intel(R) OpenCL" by "Intel(R) Corporation"
GPU devices on platform: 1
D0: "GeForce GTX 970"
D1: "Intel(R) HD Graphics 610"
Using 79 bit core.
91483088936013660161 | 1326652510^262144+1
91483089472017399809 | 1277599416^262144+1
91483091176579399681 86917.8/s (90.5P/day) Found 2 ETA 1h18m
Termination requested
<- CTRL+C pressed
C:\Users\mcw\Desktop\sieve>ocl_w64_2G.exe 18 91483 91488 B12
GFNSvCUDA+ v0.7.1 (c) 2015 Anand Nair (anand.s.nair AT gmail)
OpenCL port by Roman Trunov (stream AT proxyma ru)
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
Using factor file 'f18_91483P_91488P.txt'
Using checkpoint file 'c18_91483P_91488P.txt'
Resuming from checkpoint value 91483091569822138369
Found OCL platform "AMD Accelerated Parallel Processing" by "Advanced Micro Devices, Inc."
GPU devices on platform: 0
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 1
Found OCL platform "Intel(R) OpenCL" by "Intel(R) Corporation"
GPU devices on platform: 1
D0: "GeForce GTX 970"
D1: "Intel(R) HD Graphics 610"
Using 79 bit core.
91483094216605696001 | 1263954208^262144+1
91483097949873897473 | 1676786212^262144+1
91483097973808168961 | 141132714^262144+1
91483098276698259457 86487.6/s (90.0P/day) Found 3 ETA 1h18m
Termination requested
<- CTRL+C pressed
C:\Users\mcw\Desktop\sieve>type f18_91483P_91488P.txt
GFN Sieve for k^262144+1 [k == 2 to 2000000000]
91483000763856715777 | 821639908^262144+1
91483012664942657537 | 1181562520^262144+1
91483017290328309761 | 1327778384^262144+1
91483017741184008193 | 1725107092^262144+1
91483034910712135681 | 35354860^262144+1
91483038856307015681 | 1656806252^262144+1
91483046085517639681 | 1101324452^262144+1
91483048858065829889 | 1230460700^262144+1
91483050224393912321 | 1493028414^262144+1
91483055143844315137 | 1769064358^262144+1
91483058338980167681 | 477873178^262144+1
91483064750573617153 | 1356201550^262144+1
91483082985882255361 | 1498244334^262144+1
91483084423112949761 | 479758486^262144+1
91483084930536701953 | 1780915770^262144+1
91483088936013660161 | 1326652510^262144+1
91483089472017399809 | 1277599416^262144+1
91483094216605696001 | 1263954208^262144+1
91483097949873897473 | 1676786212^262144+1
91483097973808168961 | 141132714^262144+1
C:\Users\mcw\Desktop\sieve>
As you can see, there are no multiple occurrences of any found factor.
Maybe a cache problem or a different signal handling... I didn't investigate this.
I hope that JimB sorts out the entries with some kind of UNIQUE statement/mechanism before or when pushing the results into the database... just wanted to let you know :-).
//walli | 
