fond of a factor? Urn yourself to become remains - Page 100

Dubslow · 2016-02-25, 19:20

Quote:

Originally Posted by axn

ECM work is not really duplicated or wasted.

True, but a record of who has done how much work where is never a bad thing.

TObject · 2016-02-25, 19:37

What are the chances two people will run exactly the same curve? Extremely small?

casmith789 · 2016-02-26, 23:46

I decided to take a punt on an exponent I had been assigned:

no factor for M77961971 from 2^75 to 2^76 [mfaktc 0.21 barrett76_mul32_gs]
no factor for M77961971 from 2^76 to 2^77 [mfaktc 0.21 barrett87_mul32_gs]
no factor for M77961971 from 2^77 to 2^78 [mfaktc 0.21 barrett87_mul32_gs]
M77961971 has a factor: 533579269373988895703777

took me over 1000GHz days of work :)

http://www.mersenne.ca/exponent/77961971

I was thankful that that isn't easily found by P-1 though, didn't want to think I'd wasted my GPU cycles!

I know it's not the largest factor on here but it's probably the one I've spent the most time on and actually succeeded :)

TObject · 2016-02-27, 00:07

Good find. I also take wave front first time exponents to 79 before assigning them to really old machines… For newer computers it makes sense to just run the LL test.

Jwb52z · 2016-02-27, 05:47

P-1 found a factor in stage #1, B1=615000.
UID: Jwb52z/Clay, M74683031 has a factor: 44664350248380904476819193 (P-1, B1=615000)

85.207 bits.

Jwb52z · 2016-03-13, 22:47

P-1 found a factor in stage #1, B1=630000.
UID: Jwb52z/Clay, M75909133 has a factor: 1460917115983359723544993 (P-1, B1=630000)

80.273 bits.

lycorn · 2016-03-15, 22:00

Another one bites the dust:

ECM found a factor in curve #216, stage #2
Sigma=6254442244963386, B1=11000000, B2=1100000000.
UID: lycorn/asteroid, M15149 has a factor: 3519184049073327944797207886908866406374551 (ECM curve 216, B1=11000000, B2=1100000000),

141.336 bits, and prime.

It´s the lowest number I ever factored. Broke my previous record of M20011.

Gordon · 2016-03-15, 22:24

Quote:

Originally Posted by lycorn

Another one bites the dust:

ECM found a factor in curve #216, stage #2
Sigma=6254442244963386, B1=11000000, B2=1100000000.
UID: lycorn/asteroid, M15149 has a factor: 3519184049073327944797207886908866406374551 (ECM curve 216, B1=11000000, B2=1100000000),

141.336 bits, and prime.

It´s the lowest number I ever factored. Broke my previous record of M20011.

Very nice

When I finish taking the 30k-31k range all up to a full T40 think I might head lower...

LaurV · 2016-03-16, 03:26

Quote:

Originally Posted by lycorn

It´s the lowest number I ever factored. Broke my previous record of M20011.

Congrats! This was a nice one!

Jwb52z · 2016-03-25, 19:41

P-1 found a factor in stage #1, B1=625000.
UID: Jwb52z/Clay, M75565537 has a factor: 148893459288809851942730148146257 (P-1, B1=625000),

106.876 bits.

Gordon · 2016-03-26, 00:44

Quote:

Originally Posted by Jwb52z

P-1 found a factor in stage #1, B1=625000.
UID: Jwb52z/Clay, M75565537 has a factor: 148893459288809851942730148146257 (P-1, B1=625000),

106.876 bits.

Any factor above 100 bits is a nice find

2016-03-15, 22:00	#1096
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 3×491 Posts	Another one bites the dust: ECM found a factor in curve #216, stage #2 Sigma=6254442244963386, B1=11000000, B2=1100000000. UID: lycorn/asteroid, M15149 has a factor: 3519184049073327944797207886908866406374551 (ECM curve 216, B1=11000000, B2=1100000000), 141.336 bits, and prime. It´s the lowest number I ever factored. Broke my previous record of M20011. Last fiddled with by lycorn on 2016-03-15 at 22:07

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2016-02-25, 19:37	#1091
TObject Feb 2012 110010101₂ Posts	What are the chances two people will run exactly the same curve? Extremely small?

2016-02-26, 23:46	#1092
casmith789 Dec 2014 20₈ Posts	I decided to take a punt on an exponent I had been assigned: no factor for M77961971 from 2^75 to 2^76 [mfaktc 0.21 barrett76_mul32_gs] no factor for M77961971 from 2^76 to 2^77 [mfaktc 0.21 barrett87_mul32_gs] no factor for M77961971 from 2^77 to 2^78 [mfaktc 0.21 barrett87_mul32_gs] M77961971 has a factor: 533579269373988895703777 took me over 1000GHz days of work :) http://www.mersenne.ca/exponent/77961971 I was thankful that that isn't easily found by P-1 though, didn't want to think I'd wasted my GPU cycles! I know it's not the largest factor on here but it's probably the one I've spent the most time on and actually succeeded :)

2016-02-27, 00:07	#1093
TObject Feb 2012 3⁴×5 Posts	Good find. I also take wave front first time exponents to 79 before assigning them to really old machines… For newer computers it makes sense to just run the LL test.

2016-02-27, 05:47	#1094
Jwb52z Sep 2002 17·47 Posts	P-1 found a factor in stage #1, B1=615000. UID: Jwb52z/Clay, M74683031 has a factor: 44664350248380904476819193 (P-1, B1=615000) 85.207 bits.

2016-03-13, 22:47	#1095
Jwb52z Sep 2002 17×47 Posts	P-1 found a factor in stage #1, B1=630000. UID: Jwb52z/Clay, M75909133 has a factor: 1460917115983359723544993 (P-1, B1=630000) 80.273 bits.

2016-03-25, 19:41	#1099
Jwb52z Sep 2002 17×47 Posts	P-1 found a factor in stage #1, B1=625000. UID: Jwb52z/Clay, M75565537 has a factor: 148893459288809851942730148146257 (P-1, B1=625000), 106.876 bits.