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Old 2017-12-14, 22:16   #1358
GP2
 
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Sep 2003

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One more thing related to M2207441, M2233183, M2233019 and any similar cases:

We now seem to be relying on the "Number of known factors" displayed in the PRP Cofactor section. This suggests that any PRP tests done with a bogus factor string should be removed from the PRP Cofactor section at least, and perhaps even from the History. This prevents any confusion about exactly which factors were used.

Currently, this seems to be done in an inconsistent way:

For M2207441 the bogus 2017-10-18 test does not appear in the PRP Cofactor section, although the equally bogus 2017-10-09 test does appear. Both appear in History.

For M2233183, the bogus 2017-10-18 test does not appear in the PRP Cofactor section, but the presumably equally bogus 2017-10-10 test does appear. Hard to say, since it was a "known_factors" result, but it almost certainly used the same factor string. Since Oliver e-mailed you his old results.txt files, it should be possible to check. In any case both of those old results were obsoleted by the discovery of a new factor on 2017-11-09.

For M2233019, the bogus 2017-10-18 test does not appear in the PRP Cofactor section, but the presumably equally bogus 2017-10-10 test does appear. That was also a "known_factors" result, but it almost certainly used the same bogus factor string. Again, Oliver's old results.txt files could be checked if necessary.

There are a handful of other cases:

For M2210209, I submitted a result with a garbled factor string due to a copy-paste mishap, which was noticed by James Heinrich. In a private message from Madpoo dated 2017-10-11, 16:33 from me, James Heinrich and Prime95, he mentioned that he removed it from the results log and also the cofactor PRP table. There is now no trace of this bogus result in the Exponent Status.

In a followup private message from James Heinrich to the same recipients dated 2017-10-11, 16:38, he mentioned two of alperton's old results for 37811 and M1132997 with garbled and truncated factors, where the factor string must have been copy-pasted incorrectly.

For 37811, this still appears in the History section and in the PRP Cofactor section as a "Bad" result. For consistency with the handling of M2210209, perhaps these should both be removed, or at least in the PRP Cofactor section.

For M1132997, it's the same story.

So there are six cases in all, where the handling ranged from leaving everything as-is to removing all trace of the bogus result. For consistency they should all be handled the same way. I think there is no value in keeping bogus results that originated in garbled input.

PS,
The only genuine Bad result for PRP Cofactor testing that I'm aware of is ATH's result for 3167573, which appears to have been done with an older version before the Gerbicz error checking and recovery code was put into the program.
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