Found a factor? Post it here. - Page 126

c10ck3r · 2019-03-31, 21:56

Quote:

Originally Posted by Miszka

Today I found my largest composite factor 19147642464835832222111776488276027610060674573088897824886038321359 (223.5 bits - 68 digits) =82139596673583394582617549419848961 * 233110987151874257840851425095119 for the number of M3146833.

Can someone point me to a link of how to calculate the probability of P-1 finding a factor, as well as the GhZ-Day calculation for P-1? If I could figure out how to make a script to identify exponents < 40M which have similarly high likelihood of factors found/GhZ-Day, I might have to throw my home computers on them...

James Heinrich · 2019-03-31, 21:57

https://www.mersenne.ca/prob.php
https://www.mersenne.ca/p1small.php *

*this is actually pretty out-of-date and needs to be reworked, you may or may not find anything useful there.

petrw1 · 2019-04-01, 16:41

2467763 Factored 300535914423293271697652047026544474483005087353

2019-03-15 Sid & Andy F-PM1 Factor: 300535914423293271697652047026544474483005087353 / (P-1, B1=6000000, B2=180000000, E=12)

LaurV · 2019-04-02, 02:25

Quote:

Originally Posted by petrw1

2467763 Factored 300535914423293271697652047026544474483005087353

2019-03-15 Sid & Andy F-PM1 Factor: 300535914423293271697652047026544474483005087353 / (P-1, B1=6000000, B2=180000000, E=12)

Wow, nice one, 158 bits, prime! Congrats!

Jwb52z · 2019-04-02, 03:06

P-1 found a factor in stage #1, B1=685000.
UID: Jwb52z/Clay, M91131653 has a factor: 169246433448198777407647199 (P-1, B1=685000)

87.129 bits.

newalex · 2019-04-04, 05:20

320000-360000 range has been completed. 711 exponents were processed and 56 new factors were found. Now i am starting work on 360000-400000 range.

Also I found my first small P-1 factor
P-1 found a factor in stage #2, B1=100000000, B2=2000000000, E=12.
M287939 has a factor: 27265853414344474964957059537 (P-1, B1=100000000, B2=2000000000, E=12)

petrw1 · 2019-04-04, 05:24

Quote:

Originally Posted by newalex

320000-360000 range has been completed. 711 exponents were processed and 56 new factors were found. Now i am starting work on 360000-400000 range.

Also I found my first small P-1 factor
P-1 found a factor in stage #2, B1=100000000, B2=2000000000, E=12.
M287939 has a factor: 27265853414344474964957059537 (P-1, B1=100000000, B2=2000000000, E=12)

Impressive

lycorn · 2019-04-04, 11:58

Quote:

Originally Posted by newalex

(...) with a major goal to complete all unfactored <500000 to 30-digits level.

I´m gonna help you out with the remaining exponents in the 200k range.

Still, I´ll be much slower than you. Your rig is FAST, man!

newalex · 2019-04-04, 12:52

yes, these two Xeon Scalable processors are awesome. Each core processes about 350 curves per day for B1=250k in this range.
I appreciate your help. Together we will make it done faster. I plan to work up to 500k first so 200k range is all your for 2-3 months.

lycorn · 2019-04-04, 13:06

My Kaby Lake @3GHz completes ~285/day per core for the same range.

Will be a bit more as soon as the 200k starts. 2 - 3 months will certainly be enough to complete the range.

newalex · 2019-04-06, 07:43

The second P-1 factor for small exponents
P-1 found a factor in stage #2, B1=100000000, B2=2000000000, E=12.
M237959 has a factor: 8069793616575708974657372316228989319881 (P-1, B1=100000000, B2=2000000000, E=12)
132.568 bits

2019-03-31, 21:57	#1377
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 10106₈ Posts	https://www.mersenne.ca/prob.php https://www.mersenne.ca/p1small.php * this is actually pretty out-of-date and needs to be reworked, you may or may not find anything useful there. Last fiddled with by James Heinrich on 2019-03-31 at 21:57*

2019-04-01, 16:41	#1378
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 2³×661 Posts	157.7 Bits 2467763 Factored 300535914423293271697652047026544474483005087353 2019-03-15 Sid & Andy F-PM1 Factor: 300535914423293271697652047026544474483005087353 / (P-1, B1=6000000, B2=180000000, E=12)

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2019-04-02, 03:06	#1380
Jwb52z Sep 2002 853 Posts	P-1 found a factor in stage #1, B1=685000. UID: Jwb52z/Clay, M91131653 has a factor: 169246433448198777407647199 (P-1, B1=685000) 87.129 bits.

2019-04-04, 05:20	#1381
newalex Feb 2019 16₁₀ Posts	320000-360000 range has been completed. 711 exponents were processed and 56 new factors were found. Now i am starting work on 360000-400000 range. Also I found my first small P-1 factor P-1 found a factor in stage #2, B1=100000000, B2=2000000000, E=12. M287939 has a factor: 27265853414344474964957059537 (P-1, B1=100000000, B2=2000000000, E=12)

2019-04-04, 12:52	#1384
newalex Feb 2019 2⁴ Posts	yes, these two Xeon Scalable processors are awesome. Each core processes about 350 curves per day for B1=250k in this range. I appreciate your help. Together we will make it done faster. I plan to work up to 500k first so 200k range is all your for 2-3 months.

2019-04-04, 13:06	#1385
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 11000101001₂ Posts	My Kaby Lake @3GHz completes ~285/day per core for the same range. Will be a bit more as soon as the 200k starts. 2 - 3 months will certainly be enough to complete the range.

2019-04-06, 07:43	#1386
newalex Feb 2019 2⁴ Posts	The second P-1 factor for small exponents P-1 found a factor in stage #2, B1=100000000, B2=2000000000, E=12. M237959 has a factor: 8069793616575708974657372316228989319881 (P-1, B1=100000000, B2=2000000000, E=12) 132.568 bits