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2021-09-26, 19:49   #1948
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

70148 Posts

Quote:
 Originally Posted by Jwb52z 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

2021-09-26, 20:30   #1949
Viliam Furik

"Viliam Furík"
Jul 2018
Martin, Slovakia

10111010012 Posts

Quote:
 Originally Posted by Jwb52z 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.

 2021-09-27, 12:42 #1950 kruoli     "Oliver" Sep 2017 Porta Westfalica, DE 2·5·83 Posts Additionally, it's stage 1 only, so really impressive! (k = 5 × 37 × 251 × 1493 × 2203 × 9533 × 25301 × 59467 × 607147)
 2021-09-27, 22:23 #1951 Stargate38     "Daniel Jackson" May 2011 14285714285714285714 10101010002 Posts M1960050767 has a factor: 2681764646543406705689 [TF:68:72:mfaktc 0.21 barrett76_mul32_gs] k=2^2*11^2*349*4049977
2021-09-28, 09:09   #1952
Zhangrc

"University student"
May 2021
Beijing, China

3×5×13 Posts

Quote:
 Originally Posted by Stargate38 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

2021-09-28, 09:18   #1953
Happy5214

"Alexander"
Nov 2008
The Alamo City

23×97 Posts

Quote:
 Originally Posted by Zhangrc 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.

 2021-09-29, 06:45 #1954 Miszka     May 2013 Poland 2·3·17 Posts 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
2021-09-29, 07:05   #1955
axn

Jun 2003

526410 Posts

Quote:
 Originally Posted by Miszka 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.

2021-09-29, 08:01   #1956
Miszka

May 2013
Poland

11001102 Posts

Quote:
 Originally Posted by axn 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.

2021-09-29, 13:54   #1957
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

1110000011002 Posts

Quote:
 Originally Posted by Miszka 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.

2021-09-29, 17:06   #1958
Miszka

May 2013
Poland

2×3×17 Posts

Quote:
 Originally Posted by James Heinrich 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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