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2019-03-31, 21:56   #1376
c10ck3r

Aug 2010
Kansas

547 Posts

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...

 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Ontario 101068 Posts https://www.mersenne.ca/prob.php https://www.mersenne.ca/p1small.php * *this is actually pretty out-of-date and needs to be reworked, you may or may not find anything useful there.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)
2019-04-02, 02:25   #1379
LaurV
Romulan Interpreter

"name field"
Jun 2011
Thailand

5×112×17 Posts

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!

 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, 05:24   #1382
petrw1
1976 Toyota Corona years forever!

"Wayne"
Nov 2006

10100101010002 Posts

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

2019-04-04, 11:58   #1383
lycorn

"GIMFS"
Sep 2002
Oeiras, Portugal

110001010012 Posts

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!

 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

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