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Old 2021-09-26, 19:49   #1948
James Heinrich
 
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Quote:
Originally Posted by Jwb52z View Post
I think this might be my biggest factor, ever! 127.734 bits!
No doubt about it, and by a full 10 bits too!
https://www.mersenne.ca/userfactors/any/789/bits
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Old 2021-09-26, 20:30   #1949
Viliam Furik
 
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Quote:
Originally Posted by Jwb52z View Post
P-1 found a factor in stage #1, B1=763000.
UID: Jwb52z/Clay, M106358779 has a factor: 282917789511750372931085031635362975391 (P-1, B1=763000),

I think this might be my biggest factor, ever!

127.734 bits!
mersenne.ca agrees with the statement. Congratulations!

Last fiddled with by Viliam Furik on 2021-09-26 at 20:32 Reason: Clarification: I didn't notice James's post.
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Old 2021-09-27, 12:42   #1950
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Additionally, it's stage 1 only, so really impressive! (k = 5 × 37 × 251 × 1493 × 2203 × 9533 × 25301 × 59467 × 607147)
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Old 2021-09-27, 22:23   #1951
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M1960050767 has a factor: 2681764646543406705689 [TF:68:72:mfaktc 0.21 barrett76_mul32_gs]

k=2^2*11^2*349*4049977
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Old 2021-09-28, 09:09   #1952
Zhangrc
 
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Quote:
Originally Posted by Stargate38 View Post
M1960050767 has a factor
If you mean >1G factors, There are plenty of them. Really easy to find :)
M9936653029 has a factor: 213977058851543423
M9936653539 has a factor: 246744834363283577
M9936654059 has a factor: 272196433996068913
M9936654521 has a factor: 591144276498767839
M9936654757 has a factor: 728248663011034327
M9936654911 has a factor: 1037904750655600609
M9936655019 has a factor: 1007399390014580737
M9936655051 has a factor: 212091622097602769
M9936656221 has a factor: 951250388947975799
M9936656707 has a factor: 433804860337259969
M9936656729 has a factor: 307538631463444391
M9936657383 has a factor: 264243303974865209
M9936657853 has a factor: 888262011431568497
M9936657859 has a factor: 201544436421468281

Last fiddled with by Zhangrc on 2021-09-28 at 09:11
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Old 2021-09-28, 09:18   #1953
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Quote:
Originally Posted by Zhangrc View Post
If you mean >1G factors, There are plenty of them. Really easy to find :)
It doesn't have to be a particularly noteworthy factor for Stargate to be fond of it. (Re-read the thread title.) Now, if we start adding sub-64-bit factors here, that may be crossing the line.
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Old 2021-09-29, 06:45   #1954
Miszka
 
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M3000409 has a 94.882-bit (29-digits) factor: 36506847546234971967385191137 (P+1, B1=15000000, B2=1530000000)
This is my first factor found using the P+1 method. The previous 36 attempts were unsuccessful.
Success is diminished by the fact that this is the second factor for this Mersenne number
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Old 2021-09-29, 07:05   #1955
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Quote:
Originally Posted by Miszka View Post
Success is diminished by the fact that this is the second factor for this Mersenne number
That doesn't diminish the success. What does diminish it is the fact that this is a stealth P-1 factor. i.e. Had you done P-1 to the same bounds, it would have found the factor quicker.
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Old 2021-09-29, 08:01   #1956
Miszka
 
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Quote:
Originally Posted by axn View Post
That doesn't diminish the success. What does diminish it is the fact that this is a stealth P-1 factor. i.e. Had you done P-1 to the same bounds, it would have found the factor quicker.
In this case that would indeed be the case, but as I reviewed some results of the P+1 method there are many times when the P-1 method would not produce a result faster. e. g. 1891277
Unfortunately, it is impossible to predict which method will prove more effective in a particular case.
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Old 2021-09-29, 13:54   #1957
James Heinrich
 
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Quote:
Originally Posted by Miszka View Post
I reviewed some results of the P+1 method there are many times when the P-1 method would not produce a result faster
You can see from the list of successful P+1 efforts that it's a pretty even split between whether the factor could have been found by P-1 or not.
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Old 2021-09-29, 17:06   #1958
Miszka
 
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Quote:
Originally Posted by James Heinrich View Post
You can see from the list of successful P+1 efforts that it's a pretty even split between whether the factor could have been found by P-1 or not.
Very interesting list!

Last fiddled with by Miszka on 2021-09-29 at 17:09
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