[QUOTE=Rodrigo;332609]no factor for M3321935213 from 2^76 to 2^77 [mfakto 0.12-Win mfakto_cl_barrett79_2]
no factor for M3321935213 from 2^77 to 2^78 [mfakto 0.12-Win mfakto_cl_barrett79_2]
no factor for M3321935213 from 2^78 to 2^79 [mfakto 0.12-Win mfakto_cl_barrett79_2]
no factor for M3321935213 from 2^79 to 2^80 [mfakto 0.12-Win mfakto_cl_barrett92_2]
no factor for M3321935213 from 2^80 to 2^81 [mfakto 0.12-Win mfakto_cl_barrett92_2]
no factor for M3321935213 from 2^81 to 2^82 [mfakto 0.12-Win mfakto_cl_barrett92_2]

M3321935249 has a factor: 139473106885101315506711 [TF:76:77*:mfakto 0.12-Win mfakto_cl_barrett79]
found 1 factor for M3321935249 from 2^76 to 2^77 (partially tested) [mfakto 0.12-Win mfakto_cl_barrett79_2]

Rodrigo[/QUOTE]

Wow, nice!

I guess you wil stop at 77 bits, won't you?

Luigi

[QUOTE=ET_;332692]Wow, nice!

I guess you wil stop at 77 bits, won't you?

Luigi[/QUOTE]
Thanks, Luigi. Beginner's luck! :smile:

Yup, I had intended to stop right where the program decided to cease work on the exponent.

Would you like me to continue, and if so then to what level? Maybe 82 as I'd said before?

Rodrigo

[QUOTE=Rodrigo;332747]Thanks, Luigi. Beginner's luck! :smile:

Yup, I had intended to stop right where the program decided to cease work on the exponent.

Would you like me to continue, and if so then to what level? Maybe 82 as I'd said before?

Rodrigo[/QUOTE]

When a factor is found, we usually complete only the bit-range, no need to extend it.

I will update your reservation reflecting this policy, you may eventually extend that range when no other exponent is at a lower bitlevel :smile:

Luigi

[Sun Mar 10 04:40:26 2013]
no factor for M3321935891 from 2^75 to 2^76 [mfaktc 0.20 barrett76_mul32_gs]
[Sun Mar 10 05:22:39 2013]
no factor for M3321935891 from 2^76 to 2^77 [mfaktc 0.20 barrett77_mul32_gs]
[Sun Mar 10 06:48:13 2013]
no factor for M3321935891 from 2^77 to 2^78 [mfaktc 0.20 barrett87_mul32_gs]
[Sun Mar 10 07:08:18 2013]
no factor for M3321935963 from 2^75 to 2^76 [mfaktc 0.20 barrett76_mul32_gs]
[Sun Mar 10 07:50:30 2013]
no factor for M3321935963 from 2^76 to 2^77 [mfaktc 0.20 barrett77_mul32_gs]
[Sun Mar 10 12:35:01 2013]
no factor for M3321935963 from 2^77 to 2^78 [mfaktc 0.20 barrett87_mul32_gs]
[Sun Mar 10 12:55:14 2013]
no factor for M3321935797 from 2^75 to 2^76 [mfaktc 0.20 barrett76_mul32_gs]
[Sun Mar 10 13:37:45 2013]
no factor for M3321935797 from 2^76 to 2^77 [mfaktc 0.20 barrett77_mul32_gs]
[Sun Mar 10 15:03:54 2013]
no factor for M3321935797 from 2^77 to 2^78 [mfaktc 0.20 barrett87_mul32_gs]
[Sun Mar 10 15:24:06 2013]
no factor for M3321935861 from 2^75 to 2^76 [mfaktc 0.20 barrett76_mul32_gs]
[Sun Mar 10 16:06:33 2013]
no factor for M3321935861 from 2^76 to 2^77 [mfaktc 0.20 barrett77_mul32_gs]
[Sun Mar 10 17:32:38 2013]
no factor for M3321935861 from 2^77 to 2^78 [mfaktc 0.20 barrett87_mul32_gs]
[Sun Mar 10 20:24:17 2013]
no factor for M3321935891 from 2^78 to 2^79 [mfaktc 0.20 barrett87_mul32_gs]
[Mon Mar 11 06:48:08 2013]
no factor for M3321935963 from 2^78 to 2^79 [mfaktc 0.20 barrett87_mul32_gs]
[Mon Mar 11 09:43:11 2013]
no factor for M3321935797 from 2^78 to 2^79 [mfaktc 0.20 barrett87_mul32_gs]
[Mon Mar 11 12:43:44 2013]
no factor for M3321935861 from 2^78 to 2^79 [mfaktc 0.20 barrett87_mul32_gs]

[QUOTE=ET_;332777]When a factor is found, we usually complete only the bit-range, no need to extend it.

I will update your reservation reflecting this policy, you may eventually extend that range when no other exponent is at a lower bitlevel :smile:

Luigi[/QUOTE]
Very good, thanks!

Rodrigo

no factor for M3321935321 from 2^76 to 2^77 [mfaktc 0.20 barrett77_mul32_gs]
no factor for M3321935321 from 2^76 to 2^77 [mfaktc 0.20 barrett77_mul32_gs]
no factor for M3321935321 from 2^77 to 2^78 [mfaktc 0.20 barrett87_mul32_gs]
no factor for M3321935321 from 2^78 to 2^79 [mfaktc 0.20 barrett87_mul32_gs]
no factor for M3321935321 from 2^79 to 2^80 [mfaktc 0.20 barrett87_mul32_gs]
no factor for M3321935321 from 2^80 to 2^81 [mfaktc 0.20 barrett87_mul32_gs]
no factor for M3321935321 from 2^81 to 2^82 [mfaktc 0.20 barrett87_mul32_gs]

A question: I see that, when it finds a factor, mfaktX reports that it "partially tested" the range where the factor was found. We can see that for results by (for instance) firejuggler and me on the Results page that you're reading right now. Is there a way to tell the program to complete that range (i.e., to 79 from somewhere in 78), and if so, then how?

Rodrigo

yes.
Look for the line "StopAfterFactor" in the ini file, that should cover it.
[code]
# possible values for StopAfterFactor:
# 0: Do not stop the current assignment after a factor was found.
# 1: When a factor was found for the current assignment stop after the
# current bitlevel. This makes only sense when Stages is enabled.
# 2: When a factor was found for the current assignment stop after the
# current class.
#
# Default: StopAfterFactor=1
[/code]

You have most likely configured it as 2.

There's a StopAfterFactor line in mfaktc.ini that can be changed to suit your preference.

Edit: Best cross post ever :smile: (it must have been a literal 10 second maximum difference)

Thanks firejuggler and Dubslow.

I looked in the INI file, and the default value (I've never touched it) is at 2.

So then, what's the best way to finish the bit level where the factor was found (Luigi's suggestion)? Supposing that a factor was found somewhere at the 77-bit level (i.e., before it reached 78) for an exponent that had been planned to go to 82, would I change the StopAfterFactor value to 1, and then create a new line in WORKTODO.TXT to factor from 77 to 78?

Needless to say, I should change that value anyway if the preference is for finishing the bit level. So my question refers to the present case where factoring stopped exactly when the factor was found (if there should happen to be a better way to handle this particular situation).

Rodrigo

P.S. (edit) The policy of finishing the bit level after finding a factor is different from that for "regular" GIMPS, right? For TF over there, it's best to stop factoring an exponent as soon as a factor is found -- do I have that right?

Yes, you should change your line to 1, then add a line on your worktodo, just for the bit level containing the factor.
After that, even if your worktodo has a line Factor=N/A,332xxxxxx,75,85 and find a factor at 77.3 bit, it will only run to 78 bit and drop the exponent.

Cool, thanks!

Luigi, I'm going to finish the bit level for that exponent with the factor (3321935249; 76 to 77).

Rodrigo