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Old 2022-05-05, 18:07   #2124
nordi
 
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When looking at this result, I was expecting it to be yet another composite factor. Turns out it wasn't:

M12731681 has a 151.792-bit (46-digit) factor: 4942614515973735792916302243662188576877302039 (P-1,B1=400000,B2=428459850)

That will be 17th place on the Mersenne top factors for P-1 and is by far the biggest factor I ever found with P-1!
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Old 2022-05-06, 02:29   #2125
LaurV
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Whaaa! Congrats! Nice found!
Same number of digits like my best (currently position 13), but it falls about 0.9 bits shorter

Last fiddled with by LaurV on 2022-05-06 at 02:30
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Old 2022-05-10, 19:23   #2126
nordi
 
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Getting lucky again with my P-1 factoring:

M12782851 has a 235.159-bit (71-digit) composite (P21+P24+P27) factor: 61645213700098762638579831947213762951673986053039553206940532463429217 (P-1,B1=400000,B2=428459850)

That's the biggest triple factor I ever found (out of 4 in total).
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Old 2022-05-11, 16:02   #2127
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P-1 found a factor in stage #1, B1=509000.
UID: Jwb52z/Clay, M115285087 has a factor: 111450819426998736215606681 (P-1, B1=509000)

86.527 bits.
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Old 2022-05-16, 02:37   #2128
DrobinsonPE
 
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I finally found one that made the top 500 in this list https://www.mersenne.ca/userfactors/pm1/1/bits.

https://www.mersenne.ca/exponent/3884411 has a 123.607 bit exponent.

currently at #384 and the first factor I have found larger than 109 bits!
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Old 2022-05-16, 02:52   #2129
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Quote:
Originally Posted by DrobinsonPE View Post
...the first factor I have found larger than 109 bits!
But according to your personal factors list, you've found this and 4 other factors larger than 109.x bits, including two larger than this (131 & 136 bits, #84 & #158 in the top-500 list).

Last fiddled with by James Heinrich on 2022-05-16 at 02:53
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Old 2022-05-16, 03:38   #2130
DrobinsonPE
 
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Quote:
Originally Posted by James Heinrich View Post
But according to your personal factors list, you've found this and 4 other factors larger than 109.x bits, including two larger than this (131 & 136 bits, #84 & #158 in the top-500 list).
Cool! I did not know that list existed. I was just watching the factors I found and keeping track in my head. Obviously i missed a few and found some before I started looking.

You are my new favorite person for today!
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Old 2022-05-17, 00:27   #2131
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Quote:
Originally Posted by James Heinrich View Post
But according to your personal factors list, ...

Hi James. Are you the right person to ask about merging my two IDs as shown on that list (the old "Lord Julius" into newer "LordJulius")? If it's simple, I would appreciate it.
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Old 2022-05-17, 01:27   #2132
James Heinrich
 
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Quote:
Originally Posted by LordJulius View Post
Hi James. Are you the right person to ask about merging my two IDs as shown on that list (the old "Lord Julius" into newer "LordJulius")? If it's simple, I would appreciate it.
I am the right person to ask about anything on mersenne.ca
I have renamed/merged all Lord Julius into LordJulius.
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Old 2022-05-17, 21:16   #2133
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P-1 found a factor in stage #1, B1=510000.
UID: Jwb52z/Clay, M115435169 has a factor: 12873265828509838756458407 (P-1, B1=510000)

83.413 bits.
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Old 2022-05-22, 15:31   #2134
mrh
 
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M110368889 has a 119.453-bit (36-digit) factor: 909751501112745686529881562093681577 (P-1,B1=585000,B2=34699170)

one of my older machines still working hard...
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