Found a factor? Post it here. Or forever fold your crease. - Page 84

Dubslow · 2015-03-03, 01:32

Quote:

Originally Posted by Prime95

The title hasn't changed in over a year, time to begin another round of changes....

Unfortunately "lost prosperity office" is now seared in my head.

alpertron · 2015-03-04, 17:44

Very smooth prime factor of M1497577: 413967618533674438312273239368161 (109 bits)

k = 2⁴ × 3⁴ × 5 × 37 × 167 × 197 × 1459 × 3637 × 6703 × 492629

VictordeHolland · 2015-03-12, 11:14

B-S is working great for me this year:

Code:

[Thu Mar 12 01:00:38 2015]
P-1 found a factor in stage #2, B1=10000000, B2=200000000, E=12.
UID: VictordeHollander/PCVICTOR, M1545007 has a factor: 9694966038406498466146561 (P-1, B1=10000000, B2=200000000, E=12)

k = 3137515246988039040 = 27 × 3 × 5 × 17 × 42,181 × 2,278,866,181
25 digits 83.004 bits

2,278,866,181 > 11x B2(200,000,000)!

VictordeHolland · 2015-03-18, 11:17

My 4th B-S this year!

Code:

P-1 found a factor in stage #2, B1=10000000, B2=200000000, E=12.
UID: VictordeHollander/PCVICTOR, M1526977 has a factor: 22259470830172378348329617 (P-1, B1=10000000, B2=200000000, E=12)

26 digits 84.203 bits
k = 7288738085174949704 = 23 × 73 × 71 × 15,161 × 2,467,641,361
2,467,641,361 >12 x B2(200,000,000)

LaurV · 2015-03-18, 11:57

Lucky son of a gun! Congrats!
I have only 3 or 4 Brent-Suyama hits in lifetime (if I am not mistaken, one was from Kracker's computers, when we were exchanging GHzDays).

legendarymudkip · 2015-03-27, 16:35

M50273 has a factor: 987139826417276834314931283761815154689 (129.537 bits)
k = 2¹¹ × 3³ × 53 × 3349996012462457805367581481 (I hope you have plenty of memory for stage 2

)
Sigma 309170328303138 gave group order 2⁶ · 3² · 103 · 599 · 1373 · 2129 · 2311 · 6091 · 159793 · 252359 · 16740979, could've been found with t30 bounds instead of t40, but wrong sigmas tested, you can never know.

lycorn · 2015-03-27, 19:18

Congrats! It was a juicy one...

firejuggler · 2015-04-03, 08:36

first factor in a while.
M36794633 has a factor: 7547690687957650291279 (found by P-1,72.677 bits))
k=3*7*37*47*523*5370059
Would it have been faster with a B1 of 5370060 or with a B1 @523 and a B2@5370060?

VBCurtis · 2015-04-03, 15:57

Quote:

Originally Posted by firejuggler

first factor in a while.
M36794633 has a factor: 7547690687957650291279 (found by P-1,72.677 bits))
k=3*7*37*47*523*5370059
Would it have been faster with a B1 of 5370060 or with a B1 @523 and a B2@5370060?

I'm pretty sure B2 cannot exceed the square of B1. This is true for ECM, at least.

axn · 2015-04-03, 16:01

Quote:

Originally Posted by VBCurtis

I'm pretty sure B2 cannot exceed the square of B1. This is true for ECM, at least.

I don't understand this statement. Why can't B2 exceed square of B1 (for both P-1 and ECM)?

R.D. Silverman · 2015-04-03, 20:47

Quote:

Originally Posted by VBCurtis

I'm pretty sure B2 cannot exceed the square of B1. This is true for ECM, at least.

False for both. Why don't you try learning how both algorithms work before making future
pronouncements?

2015-03-12, 11:14	#916
VictordeHolland "Victor de Hollander" Aug 2011 the Netherlands 49B₁₆ Posts	B-S is working great for me this year: Code: [Thu Mar 12 01:00:38 2015] P-1 found a factor in stage #2, B1=10000000, B2=200000000, E=12. UID: VictordeHollander/PCVICTOR, M1545007 has a factor: 9694966038406498466146561 (P-1, B1=10000000, B2=200000000, E=12) k = 3137515246988039040 = 27 × 3 × 5 × 17 × 42,181 × 2,278,866,181 25 digits 83.004 bits 2,278,866,181 > 11x B2(200,000,000)!

2015-03-18, 11:17	#917
VictordeHolland "Victor de Hollander" Aug 2011 the Netherlands 3²×131 Posts	My 4th B-S this year! Code: P-1 found a factor in stage #2, B1=10000000, B2=200000000, E=12. UID: VictordeHollander/PCVICTOR, M1526977 has a factor: 22259470830172378348329617 (P-1, B1=10000000, B2=200000000, E=12) 26 digits 84.203 bits k = 7288738085174949704 = 23 × 73 × 71 × 15,161 × 2,467,641,361 2,467,641,361 >12 x B2(200,000,000)

2015-04-03, 08:36	#921
firejuggler "Vincent" Apr 2010 Over the rainbow 2³·5·73 Posts	first factor in a while. M36794633 has a factor: 7547690687957650291279 (found by P-1,72.677 bits)) k=3737475235370059 Would it have been faster with a B1 of 5370060 or with a B1 @523 and a B2@5370060? Last fiddled with by firejuggler on 2015-04-03 at 08:37*

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2015-03-04, 17:44	#915
alpertron Aug 2002 Buenos Aires, Argentina 5F3₁₆ Posts	Very smooth prime factor of M1497577: 413967618533674438312273239368161 (109 bits) k = 2⁴ × 3⁴ × 5 × 37 × 167 × 197 × 1459 × 3637 × 6703 × 492629

2015-03-18, 11:57	#918
LaurV Romulan Interpreter "name field" Jun 2011 Thailand 10291₁₀ Posts	Lucky son of a gun! Congrats! I have only 3 or 4 Brent-Suyama hits in lifetime (if I am not mistaken, one was from Kracker's computers, when we were exchanging GHzDays).

2015-03-27, 16:35	#919
legendarymudkip Jun 2014 78₁₆ Posts	M50273 has a factor: 987139826417276834314931283761815154689 (129.537 bits) k = 2¹¹ × 3³ × 53 × 3349996012462457805367581481 (I hope you have plenty of memory for stage 2 ) Sigma 309170328303138 gave group order 2⁶ · 3² · 103 · 599 · 1373 · 2129 · 2311 · 6091 · 159793 · 252359 · 16740979, could've been found with t30 bounds instead of t40, but wrong sigmas tested, you can never know.

2015-03-27, 19:18	#920
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 2×7×113 Posts	Congrats! It was a juicy one...