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 2013-08-12, 03:52 #8 EdH     "Ed Hall" Dec 2009 Adirondack Mtns 2·3·619 Posts At about 1660 curves @ 43000000: Code: \$ python ecm.py -threads 2 -c 2000 43000000 ___________________________________________________________________ -> | Running ecm.py, a Python driver for distributing GMP-ECM work | -> | on a single machine. It is Copyright, 2012, David Cleaver and | -> | is a conversion of factmsieve.py that is Copyright, 2010, Brian | -> | Gladman. Version 0.10 (Python 2.6 or later) 30th Sep 2012. | -> |_________________________________________________________________| -> Number(s) to factor: -> 82572604842970740226575313011024210867650562043391903215525706141475272605260959388176023149958914785033958356770086632201183899666330968322243 (143 digits) ->============================================================================= -> Working on number: 825726048429707402...899666330968322243 (143 digits) -> Currently working on: job5530.txt -> Starting 2 instances of GMP-ECM... -> ./ecm -c 1000 43000000 < job5530.txt > job5530_t00.txt -> ./ecm -c 1000 43000000 < job5530.txt > job5530_t01.txt GMP-ECM 6.4.4 [configured with GMP 5.1.2, --enable-asm-redc] [ECM] Using B1=43000000, B2=240490660426, polynomial Dickson(12), 2 threads Done 219/2000; avg s/curve: stg1 199.7s, stg2 57.81s; runtime: 28620s Run 219 out of 2000: Using B1=43000000, B2=240490660426, polynomial Dickson(12), sigma=2507321602 Step 1 took 200036ms Step 2 took 57956ms ********** Factor found in step 2: 1207628288954874358756230750720893104793451481159 Found probable prime factor of 49 digits: 1207628288954874358756230750720893104793451481159 Probable prime cofactor 68375845115745085102927692017310006270434002895546517987965895954910700224363999707612562247077 has 95 digits