fond of a factor? Urn yourself to become inane - Page 159

Jwb52z · 2020-12-07, 06:57

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.

ET_ · 2020-12-07, 13:37

Quote:

Originally Posted by Jwb52z

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])

ET_ · 2020-12-07, 14:44

Quote:

Originally Posted by petrw1

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]

Kalli Hofmann · 2020-12-07, 18:27

M197 has a factor: 26828803997912886929710867041891989490486893845712448833 (already known)
But M26828803997912886929710867041891989490486893845712448833 has a factor: 126363666830169697438938183767311270500193270013305634003431 (196.3313 bit)

Uncwilly · 2020-12-07, 21:16

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.

LaurV · 2020-12-08, 05:03

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 · 2^1290000-1) has a factor 2618163402417 · 2^1290001-1 (1290043 bits)
(the largest "trivial" known, since 2016)

Xyzzy · 2020-12-08, 13:53

Our largest P-1 factor ever: 34925362324925878138544818314286841

James Heinrich · 2020-12-08, 14:14

Congrats! New record!

Jwb52z · 2020-12-09, 00:30

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.

mrh · 2020-12-10, 14:46

Found a 74 bit factor for 122223323, not a big factor, but a nice looking number.

nordi · 2020-12-17, 01:19

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 ;-)

2020-12-08, 05:03	#1744
LaurV Romulan Interpreter Jun 2011 Thailand 5²·7·53 Posts	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 · 2^1290000-1) has a factor 2618163402417 · 2^1290001-1 (1290043 bits) (the largest "trivial" known, since 2016) Last fiddled with by LaurV on 2020-12-08 at 05:08

2020-12-17, 01:19	#1749
nordi Dec 2016 2³·7 Posts	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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2020-12-07, 06:57	#1739
Jwb52z Sep 2002 5×157 Posts	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.

2020-12-07, 18:27	#1742
Kalli Hofmann "Karl-Heinz Hofmann" Jan 2017 Gr.-Rohrheim Germany 19₁₆ Posts	M197 has a factor: 26828803997912886929710867041891989490486893845712448833 (already known) But M26828803997912886929710867041891989490486893845712448833 has a factor: 126363666830169697438938183767311270500193270013305634003431 (196.3313 bit)

2020-12-07, 21:16	#1743
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 2·3²·521 Posts	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.

2020-12-08, 13:53	#1745
Xyzzy "Mike" Aug 2002 2⁴·499 Posts	Our largest P-1 factor ever: 34925362324925878138544818314286841

2020-12-08, 14:14	#1746
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 3,271 Posts	Congrats! New record!

2020-12-09, 00:30	#1747
Jwb52z Sep 2002 5×157 Posts	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.

2020-12-10, 14:46	#1748
mrh "mrh" Oct 2018 Temecula, ca 2·3·11 Posts	Found a 74 bit factor for 122223323, not a big factor, but a nice looking number.