Found a factor, sunshine? Embalm and entomb it here! (RU "Выкрасить и выбросить")) - Page 179

firejuggler · 2021-10-06, 17:07

M6220651 has a 96.568-bit (30-digit) factor: 117465933684061090230298707631 (P-1,B1=3000000,B2=243000000)

96 bits. at this exponent size, this is a beauty.

James Heinrich · 2021-10-08, 23:06

Not the normal kind of factor posted here, but I was YAFU'ing a C107 that was already ECM'd appropriately, but YAFU 1.34 likes to recalculate ECM effort and do a few more curves, which actually worked beautifully this time:

Code:

current ECM pretesting depth: 35.52
scheduled 67 curves at B1=3000000 toward target pretesting depth of 35.67
prp37 = 5217870316310181049264840173981775799 (curve 1 stg2 B1=3000000 sigma=3040696252 thread=0)

The first (second?) curve split the C107=p37+p70
What I expected to take ~8000 seconds took 9.5s

kruoli · 2021-10-09, 22:03

Maybe you were looking for this thread?

If I understand correctly, this one is only for factors of Mersenne numbers with prime exponents.

James Heinrich · 2021-10-09, 22:36

Quote:

Originally Posted by kruoli

Maybe you were looking for this thread?

I probably was.

Jwb52z · 2021-10-21, 04:03

P-1 found a factor in stage #2, B1=756000, B2=20988000.
UID: Jwb52z/Clay, M107023759 has a factor: 15845389801763193699707633 (P-1, B1=756000, B2=20988000)

83.712 bits.

bur · 2021-10-24, 11:56

Nothing spectacular, but the first P-1 tests I did in a while and the first to finish stage 1 returned:

Code:

[Worker #3 Oct 24 07:53] P-1 found a factor in stage #1, B1=779000.
[Worker #3 Oct 24 07:53] M107043329 has a factor: 9773787110913045103371451921 (P-1, B1=779000)

k = 45653415314246463240 = 2^3 × 3^3 × 5 × 11 × 21841 × 317797 × 553649

Jwb52z · 2021-10-29, 20:37

P-1 found a factor in stage #1, B1=756000.
UID: Jwb52z/Clay, M107072687 has a factor: 95352689558688112327801 (P-1, B1=756000)

76.336 bits.

firejuggler · 2021-10-30, 06:12

M6234491 has a 107.827-bit (33-digit) factor: 287831359132009723766012795757047 (P-1,B1=3000000,B2=243000000)

k=23 × 223 × 277 × 129 971 × 627 611 × 199 185 461

chalsall · 2021-10-31, 03:55

Sometimes you just have to laugh at stats...

This was a "one-off" timing test.

nordi · 2021-10-31, 13:58

M260543 has a 102.431-bit (31-digit) factor: 6833981637847127989838565387041 (ECM,B1=1000000,B2=162000000,Sigma=3342767857012760)
That's the 9th known factor, Seth_Tr found the 8th factor in May.

M194653 has a 124.361-bit (38-digit) factor: 27323512924583858950580510798298798737 (ECM,B1=3000000,B2=477000000,Sigma=6798721071652496)
That's the 10th known factor

, I found the 9th factor 2 months ago.

masser · 2021-10-31, 16:41

Quote:

Originally Posted by nordi

M260543 has a 102.431-bit (31-digit) factor: 6833981637847127989838565387041 (ECM,B1=1000000,B2=162000000,Sigma=3342767857012760)
That's the 9th known factor, Seth_Tr found the 8th factor in May.

M194653 has a 124.361-bit (38-digit) factor: 27323512924583858950580510798298798737 (ECM,B1=3000000,B2=477000000,Sigma=6798721071652496)
That's the 10th known factor

, I found the 9th factor 2 months ago.

2021-10-08, 23:06	#1960
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 2²·929 Posts	Not the normal kind of factor posted here, but I was YAFU'ing a C107 that was already ECM'd appropriately, but YAFU 1.34 likes to recalculate ECM effort and do a few more curves, which actually worked beautifully this time: Code: current ECM pretesting depth: 35.52 scheduled 67 curves at B1=3000000 toward target pretesting depth of 35.67 prp37 = 5217870316310181049264840173981775799 (curve 1 stg2 B1=3000000 sigma=3040696252 thread=0) The first (second?) curve split the C107=p37+p70 What I expected to take ~8000 seconds took 9.5s Last fiddled with by James Heinrich on 2021-10-08 at 23:08

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Factor found that should have been found by P-1	tha	Data	65	2020-08-05 21:11
F12 factor found?	johnadam74	FermatSearch	16	2016-11-03 12:10
TF Factor Found CPU Credit	TheMawn	GPU Computing	3	2013-06-17 06:21
found this factor	tha	Factoring	4	2007-06-18 19:56
After a factor is found it keeps on going	jocelynl	Software	6	2004-08-07 01:31

2021-10-06, 17:07	#1959
firejuggler "Vincent" Apr 2010 Over the rainbow B17₁₆ Posts	M6220651 has a 96.568-bit (30-digit) factor: 117465933684061090230298707631 (P-1,B1=3000000,B2=243000000) 96 bits. at this exponent size, this is a beauty.

2021-10-09, 22:03	#1961
kruoli "Oliver" Sep 2017 Porta Westfalica, DE 2×491 Posts	Maybe you were looking for this thread? If I understand correctly, this one is only for factors of Mersenne numbers with prime exponents.

2021-10-21, 04:03	#1963
Jwb52z Sep 2002 2⁴×3×17 Posts	P-1 found a factor in stage #2, B1=756000, B2=20988000. UID: Jwb52z/Clay, M107023759 has a factor: 15845389801763193699707633 (P-1, B1=756000, B2=20988000) 83.712 bits.

2021-10-29, 20:37	#1965
Jwb52z Sep 2002 816₁₀ Posts	P-1 found a factor in stage #1, B1=756000. UID: Jwb52z/Clay, M107072687 has a factor: 95352689558688112327801 (P-1, B1=756000) 76.336 bits.

2021-10-30, 06:12	#1966
firejuggler "Vincent" Apr 2010 Over the rainbow 17·167 Posts	M6234491 has a 107.827-bit (33-digit) factor: 287831359132009723766012795757047 (P-1,B1=3000000,B2=243000000) k=23 × 223 × 277 × 129 971 × 627 611 × 199 185 461

2021-10-31, 03:55	#1967
chalsall If I May "Chris Halsall" Sep 2002 Barbados 10454₁₀ Posts	Sometimes you just have to laugh at stats... This was a "one-off" timing test.

2021-10-31, 13:58	#1968
nordi Dec 2016 78₁₆ Posts	M260543 has a 102.431-bit (31-digit) factor: 6833981637847127989838565387041 (ECM,B1=1000000,B2=162000000,Sigma=3342767857012760) That's the 9th known factor, Seth_Tr found the 8th factor in May. M194653 has a 124.361-bit (38-digit) factor: 27323512924583858950580510798298798737 (ECM,B1=3000000,B2=477000000,Sigma=6798721071652496) That's the 10th known factor , I found the 9th factor 2 months ago.