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Old 2020-12-17, 01:32   #1750
James Heinrich
 
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"James Heinrich"
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Quote:
Originally Posted by nordi View Post
M1489 has a 198.101-bit (60-digit) factor: 430768120877571983358263339450368443038134995818878229278591 (ECM,B1=1000000000,B2=19071176724616)
Wow! Congrats!
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Old 2020-12-17, 02:57   #1751
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Old 2020-12-17, 18:23   #1752
mrh
 
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Quote:
Originally Posted by nordi View Post
UID: nordi/sweet16, M1489 has a factor: 430768120877571983358263339450368443038134995818878229278591 (ECM curve 4082, B1=1000000000, B2=19071176724616)


60 digit factor, and what's left is a probable prime! Santa came rather early this year ;-)
nice!
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Old 2020-12-18, 09:22   #1753
LaurV
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Quote:
Originally Posted by nordi View Post
M1489 has a <snip> 60 digit factor, and what's left is a <snip> prime!
Yeaaaa! B-E-A-utiful!
We wish you more like that!

Last fiddled with by LaurV on 2020-12-18 at 09:24
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Old 2020-12-21, 20:46   #1754
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M32140793 has a 101.170-bit (31-digit) factor: 2852080042007189358945866948633 (P-1,B1=600000,B2=13000000,E=12)
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Old 2020-12-23, 14:38   #1755
Viliam Furik
 
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Yesterday my GPU found this pair of factors:

13648334340553940219999 = 2 * 52,571,576,271,773 * 129807163 + 1
13688346971328393811703 = 2 * 52,725,699,626,177 * 129807163 + 1

Interesting how close they are in the 73-bit range.
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Old 2020-12-23, 15:11   #1756
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M32149987 has a 104.328-bit (32-digit) factor: 25465534989790678974932725022593 (P-1,B1=1000000,B2=20000000,E=12)
Thats my new record.

Slowing inching toward top 500 (117.xx bits)
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Old 2020-12-23, 15:29   #1757
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M101736851 has a 76.139-bit (23-digit) factor: 83187494794024727844737 (P-1,B1=650000)

Nowhere near my record length, but what the heck.
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Old 2020-12-23, 15:34   #1758
James Heinrich
 
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M19322383 has a 114.614-bit (35-digit) factor: 31779137418604066217200202610865553 (P-1,B1=401000,B2=401000)

Biggest P-1 factor of the past 7 days.
Also, should have been found by the original P-1 in 2003 but presumably was done with a buggy version of Prime95.

Last fiddled with by James Heinrich on 2020-12-23 at 15:53
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Old 2020-12-31, 05:45   #1759
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My kind of fun, for the moment.

https://www.mersenne.ca/exponent/4217750177

It already had one factor, now it has four more.
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Old 2020-12-31, 05:55   #1760
James Heinrich
 
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All within 1 bit of each other?? That's... unusual.
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