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Old 2020-12-07, 06:57   #1739
Jwb52z
 
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P-1 found a factor in stage #1, B1=746000.
UID: Jwb52z/Clay, M101488399 has a factor: 318084054463279132879217 (P-1, B1=746000),

78.074 bits.
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Old 2020-12-07, 13:37   #1740
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Quote:
Originally Posted by Jwb52z View Post
P-1 found a factor in stage #1, B1=746000.
UID: Jwb52z/Clay, M101488399 has a factor: 318084054463279132879217 (P-1, B1=746000),

78.074 bits.
M318084054463279132879217 has a factor: 1908504326779674797275303

(and no, M1908504326779674797275303 has 0 factors in [2^1, 2^120-1])

Last fiddled with by ET_ on 2020-12-07 at 14:40
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Old 2020-12-07, 14:44   #1741
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Quote:
Originally Posted by petrw1 View Post
I believe this was found by the Brent Suyama extension. The last factor of K is very high
M4281610697981019482542271 has a factor: 466661313194347275441247200833

M466661313194347275441247200833 has 0 factors in [2^1, 2^132-1]


Last fiddled with by ET_ on 2020-12-07 at 14:46
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Old 2020-12-07, 18:27   #1742
Kalli Hofmann
 
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M197 has a factor: 26828803997912886929710867041891989490486893845712448833 (already known)
But M26828803997912886929710867041891989490486893845712448833 has a factor: 126363666830169697438938183767311270500193270013305634003431 (196.3313 bit)
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Old 2020-12-07, 21:16   #1743
Uncwilly
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Bruno Victal turned in a 128.456 bit (39 digit) factor for M8017
466627910317083433103066106476038970159
All known prime factors for it now total 90 digits on a 2414 digit number.
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Old 2020-12-08, 05:03   #1744
LaurV
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Grrrr... please stop posting trivial factors of ridiculously huge mersenne numbers. It was fun for the first few, and took us by surprise, but they don't have any value.
If you are serious, beat this.
M(2618163402417 · 21290000-1) has a factor 2618163402417 · 21290001-1 (1290043 bits)
(the largest "trivial" known, since 2016)

Last fiddled with by LaurV on 2020-12-08 at 05:08
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Old 2020-12-08, 13:53   #1745
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Our largest P-1 factor ever: 34925362324925878138544818314286841

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Old 2020-12-08, 14:14   #1746
James Heinrich
 
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Congrats! New record!
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Old 2020-12-09, 00:30   #1747
Jwb52z
 
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P-1 found a factor in stage #1, B1=729000.
UID: Jwb52z/Clay, M101165227 has a factor: 191612436557663486778337 (P-1, B1=729000)

77.343 bits.
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Old 2020-12-10, 14:46   #1748
mrh
 
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Found a 74 bit factor for 122223323, not a big factor, but a nice looking number.
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Old 2020-12-17, 01:19   #1749
nordi
 
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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 ;-)

Last fiddled with by nordi on 2020-12-17 at 01:21
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