fond of a factor? Urn yourself to become remains - Page 102

TObject · 2016-05-03, 19:05

Quote:

Originally Posted by retina

If your system has a calculator application then you can compute it without the need to rely on an external website.

Just be careful with something like Microsoft Excel, because it will silently cut down the precision to whatever is the maximum it can work with. There is xNumbers library that adds arbitrary precision functions to Excel.

Gordon · 2016-05-30, 17:39

ECM found a factor in curve #54, stage #2
Sigma=6792843557510917, B1=1000000, B2=100000000.

M90679 has a factor: 6589076784209827854482269064939889241

(ECM curve 54, B1=1000000, B2=100000000)

122.3 bits....

lycorn · 2016-05-30, 21:18

Good one. It's always nice to knock out a sub-100k...

bloodIce · 2016-05-31, 10:09

Yep, a good one. You found it four days after my ECM on the exponent, so I had my chance, but did not score. Great, one more is down.

bloodIce · 2016-06-07, 07:02

[Mon Jun 6 23:12:20 2016]
ECM found a factor in curve #218, stage #2
Sigma=3267888520893954, B1=3000000, B2=300000000.
UID: BloodIce/URM2, M40423 has a factor: 164989575420758840709086391456486169
http://www.mersenne.ca/exponent/40423 : ~117 bits

Gordon · 2016-06-07, 08:31

Quote:

Originally Posted by bloodIce

[Mon Jun 6 23:12:20 2016]
ECM found a factor in curve #218, stage #2
Sigma=3267888520893954, B1=3000000, B2=300000000.
UID: BloodIce/URM2, M40423 has a factor: 164989575420758840709086391456486169
http://www.mersenne.ca/exponent/40423 : ~117 bits

Even better, a sub 50k exponent goes down...

lycorn · 2016-06-07, 21:36

@bloodice: you're getting really good at finding these...
How do you do it?

M36109 has a factor.

Gordon · 2016-06-07, 22:03

Quote:

Originally Posted by lycorn

@bloodice: you're getting really good at finding these...
How do you do it?

M36109 has a factor.

Put us out of our misery then...

bloodIce · 2016-06-08, 05:30

Today a sub-40K bites the dust:
[Tue Jun 7 22:10:49 2016]
ECM found a factor in curve #113, stage #1
Sigma=629186646856962, B1=3000000, B2=300000000.
UID: BloodIce/Mjolnir4, M36109 has a factor: 600691002840126002796941760359632040567 (ECM curve 113, B1=3000000, B2=300000000)
http://www.mersenne.ca/exponent/36109: ~129 bits

P.S.: Hehe, thanks for the friendly support. No mystery, just dedicating 7 cores for small ECM work and of course try 3 to 4 neighbouring exponents in batches on each machine. It is an extreme luck, that is what it is :-).

VictordeHolland · 2016-06-09, 22:04

Code:

ECM found a factor in curve #196, stage #2
Sigma=7609780438895502, B1=50000, B2=5000000.
UID: VictordeHollander/PC3770K, M1557419 has a factor: 2913347056784507060325933694843071809 (ECM curve 196, B1=50000, B2=5000000)

Not very special in terms of size (37 digits, 122 bits), but pretty decent hit with only B1=50,000 and B2=5,000,000

snme2pm1 · 2016-06-11, 10:56

Congratulations to Carsten Kossendey.

2016-05-30, 17:39	#1113
Gordon Nov 2008 3×167 Posts	Small One Turns Up A Large One ECM found a factor in curve #54, stage #2 Sigma=6792843557510917, B1=1000000, B2=100000000. M90679 has a factor: 6589076784209827854482269064939889241 (ECM curve 54, B1=1000000, B2=100000000) 122.3 bits....

2016-06-07, 07:02	#1116
bloodIce Feb 2010 Sweden 173 Posts	another sub-100K bites the dust [Mon Jun 6 23:12:20 2016] ECM found a factor in curve #218, stage #2 Sigma=3267888520893954, B1=3000000, B2=300000000. UID: BloodIce/URM2, M40423 has a factor: 164989575420758840709086391456486169 http://www.mersenne.ca/exponent/40423 : ~117 bits

2016-06-07, 21:36	#1118
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 1473₁₀ Posts	And another one... @bloodice: you're getting really good at finding these... How do you do it? M36109 has a factor.

2016-06-08, 05:30	#1120
bloodIce Feb 2010 Sweden 173 Posts	sub-40K down today Today a sub-40K bites the dust: [Tue Jun 7 22:10:49 2016] ECM found a factor in curve #113, stage #1 Sigma=629186646856962, B1=3000000, B2=300000000. UID: BloodIce/Mjolnir4, M36109 has a factor: 600691002840126002796941760359632040567 (ECM curve 113, B1=3000000, B2=300000000) http://www.mersenne.ca/exponent/36109: ~129 bits P.S.: Hehe, thanks for the friendly support. No mystery, just dedicating 7 cores for small ECM work and of course try 3 to 4 neighbouring exponents in batches on each machine. It is an extreme luck, that is what it is :-). Last fiddled with by bloodIce on 2016-06-08 at 05:51

2016-06-09, 22:04	#1121
VictordeHolland "Victor de Hollander" Aug 2011 the Netherlands 2³×3×7² Posts	Code: ECM found a factor in curve #196, stage #2 Sigma=7609780438895502, B1=50000, B2=5000000. UID: VictordeHollander/PC3770K, M1557419 has a factor: 2913347056784507060325933694843071809 (ECM curve 196, B1=50000, B2=5000000) Not very special in terms of size (37 digits, 122 bits), but pretty decent hit with only B1=50,000 and B2=5,000,000

2016-05-30, 21:18	#1114
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 2701₈ Posts	Good one. It's always nice to knock out a sub-100k...

2016-05-31, 10:09	#1115
bloodIce Feb 2010 Sweden 255₈ Posts	Yep, a good one. You found it four days after my ECM on the exponent, so I had my chance, but did not score. Great, one more is down.

2016-06-11, 10:56	#1122
snme2pm1 "Graham uses ISO 8601" Mar 2014 AU, Sydney 3⁵ Posts	M5923 factored Congratulations to Carsten Kossendey.

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