fond of a factor? Urn yourself to become remains - Page 76

TheJudger · 2013-11-26, 21:31

Quote:

Originally Posted by flashjh

But, it's nothing compared to markr's Brent-Suyama find on 18 Nov 13:

575,00010,350,000
M64369951
B1: 575,000
B2: 10,350,000
k = 2 × 154429598075412

Even more sensational: we've found a second even prime number! (SCNR)

Oliver

flashjh · 2013-11-26, 21:56

Quote:

Originally Posted by TheJudger

Even more sensational: we've found a second even prime number! (SCNR)

Oliver

(I definitely missed that)

Code:

 
k = 308859196150824 = 2³ × 3 × 11 × 17 × 63607 × 1081939

Now that changes everything.

Uncwilly · 2013-11-27, 00:26

Quote:

Originally Posted by flashjh

You are on a roll. What memory settings do you use on those systems?

Most are around 1.5GB. All have MaxHighMemWorkers=1 with 2 cores set to do P-1. (5 machines, 10 cores total devoted to P-1.)

Jwb52z · 2013-12-03, 21:48

P-1 found a factor in stage #1, B1=615000.
UID: Jwb52z/Clay, M68988589 has a factor: 1942414686951074496166120411317991

110.581 bits.

This is the second largest factor I've ever found in all the years I've tried to help with the GIMPS project and for this range, it seems like a large factor to find that is not composite.

blahpy · 2013-12-03, 22:56

It is large! Nice find!

Jwb52z · 2013-12-08, 04:27

P-1 found a factor in stage #1, B1=750000.
UID: Jwb52z/Clay, M69263003 has a factor: 32482532468448662230681

74.782 bits.

lycorn · 2013-12-09, 12:21

This one was begging to be found by TF, but...

ECM found a factor in curve #3, stage #2
Sigma=5161819488172506, B1=50000, B2=5000000.
UID: lycorn/asteroid, M721291 has a factor: 2993117629186363967

61.376 bits.

There are still some low hanging fruits in the < 1M range.

Jwb52z · 2013-12-14, 03:26

P-1 found a factor in stage #2, B1=615000, B2=11070000.
UID: Jwb52z/Clay, M68952557 has a factor: 10830722799622637276915875201

93.129 bits.

LaurV · 2013-12-16, 06:12

Hey Kracker, that computer of yours is a lucky son of the gun! Aren't you thinking to sell it?

Code:

gp> a=7912085265544058288516871389169907393;
gp > #binary(a)
%1 = 123
gp > factorint(a-1)
%2 =
[2 6]
[3 1]
[31 1]
[47 1]
[1657 1]
[6221 1]
[116791 1]
[301237 1]
[1206169 1]
[64657903 1]
gp >

(I didn't want to pollute the other thread - and upset Batalov even more :P - as the discussion there already changed to a more thematic and theoretic path)

kracker · 2013-12-17, 03:31

cheesehead · 2013-12-18, 09:18

Speaking of the <1M range:

Eleven ECM curves at B1=50000,B2=5000000 found three factors of M298691:
110218037145723511, 586220733693722359 and 137619491689490903327
(to go with the smaller three factors previously known).

2013-12-16, 06:12	#834
LaurV Romulan Interpreter Jun 2011 Thailand 9657₁₀ Posts	Hey Kracker, that computer of yours is a lucky son of the gun! Aren't you thinking to sell it? Code: gp> a=7912085265544058288516871389169907393; gp > #binary(a) %1 = 123 gp > factorint(a-1) %2 = [2 6] [3 1] [31 1] [47 1] [1657 1] [6221 1] [116791 1] [301237 1] [1206169 1] [64657903 1] gp > (I didn't want to pollute the other thread - and upset Batalov even more :P - as the discussion there already changed to a more thematic and theoretic path) Last fiddled with by LaurV on 2013-12-16 at 06:13

2013-12-18, 09:18	#836
cheesehead "Richard B. Woods" Aug 2002 Wisconsin USA 2²×3×641 Posts	Speaking of the <1M range: Eleven ECM curves at B1=50000,B2=5000000 found three factors of M298691: 110218037145723511, 586220733693722359 and 137619491689490903327 (to go with the smaller three factors previously known). Last fiddled with by cheesehead on 2013-12-18 at 09:24

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2013-12-03, 21:48	#829
Jwb52z Sep 2002 17·47 Posts	P-1 found a factor in stage #1, B1=615000. UID: Jwb52z/Clay, M68988589 has a factor: 1942414686951074496166120411317991 110.581 bits. This is the second largest factor I've ever found in all the years I've tried to help with the GIMPS project and for this range, it seems like a large factor to find that is not composite.

2013-12-03, 22:56	#830
blahpy Jun 2013 107₁₀ Posts	It is large! Nice find!

2013-12-08, 04:27	#831
Jwb52z Sep 2002 17·47 Posts	P-1 found a factor in stage #1, B1=750000. UID: Jwb52z/Clay, M69263003 has a factor: 32482532468448662230681 74.782 bits.

2013-12-09, 12:21	#832
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 3·491 Posts	This one was begging to be found by TF, but... ECM found a factor in curve #3, stage #2 Sigma=5161819488172506, B1=50000, B2=5000000. UID: lycorn/asteroid, M721291 has a factor: 2993117629186363967 61.376 bits. There are still some low hanging fruits in the < 1M range.

2013-12-14, 03:26	#833
Jwb52z Sep 2002 31F₁₆ Posts	P-1 found a factor in stage #2, B1=615000, B2=11070000. UID: Jwb52z/Clay, M68952557 has a factor: 10830722799622637276915875201 93.129 bits.

2013-12-17, 03:31	#835
kracker "Mr. Meeseeks" Jan 2012 California, USA 2³·271 Posts