DoubleCheck=38746907,71,1

I'll take this one.
registered

[QUOTE=kladner;426754]DoubleCheck=38746907,71,1

I'll take this one.
registered[/QUOTE]

Third mismatch. Once again I am unsure of my own result.

This exponent must be on an FFT boundary. CuLu selected FFT 2408. This produced a round off error of ~0.3. About midway through, I found the program short cycling (many lines quickly scrolling) with an error message concerning round off, ending with the statement, "Something is wrong." I backtracked through the Save files to a previous point, and changed the FFT to 2304. This reduced the error range from around 0.3 to about 0.03. It finished without reporting an error again.

I would be delighted if someone wants to do a quad check. :smile:
NOTE: To reiterate, this was run on a GPU, so a quad will have to be run on a CPU, or abacus, or something.
[CODE]LL
Status Date User Residue
Unverified 2007-07-04 C. Cooper / S. Boone 962C36A4F78247__
Unverified 2016-01-31 Mark Rose 80C6A70A7F04DA__
Unverified 2016-03-02 ktony 3099732E406766__[/CODE]

[QUOTE=kladner;427890]Third mismatch. Once again I am unsure of my own result.

This exponent must be on an FFT boundary. CuLu selected FFT 2408. This produced a round off error of ~0.3. About midway through, I found the program short cycling (many lines quickly scrolling) with an error message concerning round off, ending with the statement, "Something is wrong." I backtracked through the Save files to a previous point, and changed the FFT to 2304. This reduced the error range from around 0.3 to about 0.03. It finished without reporting an error again.

I would be delighted if someone wants to do a quad check. :smile:
NOTE: To reiterate, this was run on a GPU, so a quad will have to be run on a CPU, or abacus, or something.
[/QUOTE]
I grabbed it. ETA 18 hours or less.

[QUOTE=sdbardwick;427902]I grabbed it. ETA 18 hours or less.[/QUOTE]
:tu: Many Thanks!

[QUOTE=kladner;427890]
[CODE]LL
Status Date User Residue
Unverified 2007-07-04 C. Cooper / S. Boone 962C36A4F78247__
Unverified 2016-01-31 Mark Rose 80C6A70A7F04DA__
Unverified 2016-03-02 ktony 3099732E406766__[/CODE][/QUOTE]
New result for [URL="http://www.mersenne.org/report_exponent/?exp_lo=38746907&full=1"]38746907[/URL]:
[CODE]LL
Status Date User Residue
Bad 2007-07-04 C. Cooper / S. Boone 962C36A4F7824731
Verified 2016-01-31 Mark Rose 80C6A70A7F04DACE
Bad 2016-03-02 ktony 3099732E40676654
Verified 2016-03-02 Clara Oswald 80C6A70A7F04DACE
[/CODE]

[QUOTE=sdbardwick;427960]New result for [URL="http://www.mersenne.org/report_exponent/?exp_lo=38746907&full=1"]38746907[/URL]:
[CODE]LL
Status Date User Residue
Bad 2007-07-04 C. Cooper / S. Boone 962C36A4F7824731
Verified 2016-01-31 Mark Rose 80C6A70A7F04DACE
Bad 2016-03-02 ktony 3099732E40676654
Verified 2016-03-02 Clara Oswald 80C6A70A7F04DACE
[/CODE][/QUOTE]
Aw Shoot! Thanks! :smile: I am not surprised that a very recent Mark Rose result is the correct one.

Requesting double checks:

DoubleCheck=38827301,71,1
DoubleCheck=52276529,73,1

I will queue [CODE]DoubleCheck=38827301,71,1[/CODE] on the CPU. It will take about 12 days, but I am confident of a good result, unlike the GPU :no:.

[QUOTE=kladner;429673]I will queue [CODE]DoubleCheck=38827301,71,1[/CODE] on the CPU. It will take about 12 days, but I am confident of a good result, unlike the GPU :no:.[/QUOTE]

Thanks!

[QUOTE=kladner;427890]
NOTE: To reiterate, this was run on a GPU, so a quad will have to be run on a CPU, or abacus, or something.[/quote]

I wish I could be of help, but I have been getting some bad results from my abacus lately; seems as though it has been overclocked too aggressively. I performed a stress test but that only resulted in the counting wires getting bent and several of the beads flying off and hitting me in the eye. I might try increasing the voltage just a tad to see if that helps.

I thought I turned off "Use Primenet" in the options. Anyone willing to quad check a self verified result?

43313779

[url]http://www.mersenne.org/report_exponent/?exp_lo=43313779&full=1[/url]