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Old 2021-10-17, 17:57   #694
storm5510
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Quote:
Originally Posted by James Heinrich View Post
I've been told to assume that all GIMPS-range exponents have been TF'd to at least 67 thanks to the efforts of TJAOI.

I fixed these, and a few other apparent outliers. There are still 26 exponents in the 204M range that are outliers at 72 -- they've had higher TF levels done (e.g. 74-75), but there are intermediate TF levels missing from the history. Exponents listed here in case someone wants to take them to 73....

Which intermediate levels? If these are unknown, then would it not be better to run them again from scratch? By scratch I mean 2^1.
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Old 2021-10-17, 18:11   #695
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Quote:
Originally Posted by storm5510 View Post
Which intermediate levels? If these are unknown, then would it not be better to run them again from scratch? By scratch I mean 2^1.
No, why would you restart TF from zero?
The 26 exponents I listed in the post you quoted all had the missing bitlevels filled in a month ago:
Quote:
Originally Posted by Zhangrc View Post
I'll do them all by TFing them to 74 bits. I'll finish them by tonight.
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Old 2021-10-19, 15:39   #696
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Quote:
Originally Posted by James Heinrich View Post
No, why would you restart TF from zero?
The 26 exponents I listed in the post you quoted all had the missing bit levels filled in a month ago:
My apologies. I did not pay attention to the date.
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Old 2021-10-28, 00:23   #697
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There will be a delay in the .org->.ca data sync tonight, manual intervention needed on the primenet end.
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Old 2021-10-28, 04:14   #698
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... manual intervention needed on the primenet end.
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Old 2021-10-28, 15:32   #699
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Data sync for last night has now been run.
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Old 2021-11-15, 16:59   #700
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Since the trial factorization of Mersenne numbers with exponents greater than 1G is completed up to the 71-bit level, I think the tips at the top of https://www.mersenne.ca/tf1G/ should be erased.
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Old 2021-11-15, 20:56   #701
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Since the trial factorization of Mersenne numbers with exponents greater than 1G is completed up to the 71-bit level, I think the tips at the top of https://www.mersenne.ca/tf1G/ should be erased.
Thanks. I have removed the no-longer-relevant tips.
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Old 2021-11-15, 22:07   #702
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It is OK now. Thanks.
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Old 2021-11-22, 07:48   #703
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@James,


As always love the site and thanks for all the work.


I'm looking at the P-1 prob calculations, can you point me at the math you use?


When I use identical B1/B2/Factored Bits but change the exponent(A vs B) the probability of finding a factor changes slightly which I don't believe it should.
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Old 2021-11-22, 13:54   #704
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Quote:
Originally Posted by SethTro View Post
I'm looking at the P-1 prob calculations, can you point me at the math you use?
The math is not mine, it's written by Mihai Preda (original C code here). I transcribed it to PHP for use on mersenne.ca, and I believe George also copied the same logic into Prime95 about a year ago. The PHP code is a bit long to post here, email me if you want a copy.
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