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Old 2022-06-12, 13:43   #23
ryanp
 
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Jun 2012
Boulder, CO

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Got an ECM hit on the 2+ table yesterday.

Code:
GMP-ECM 7.0.5-dev [configured with GMP 6.2.0, GWNUM 30.4, --enable-asm-redc, --enable-assert] [ECM]
Due to incompatible licenses, this binary file must not be distributed.
Input number is (2^1361+1)/228211667657412909230323001705434042549018058879196001936615244070298287105666185870832703670953992780536531240215594078779119204857385398683700824873931077687558812068274836107 (234 digits)
Using B1=850000000, B2=15892628251516, polynomial Dickson(30), sigma=1:3479069830
Step 1 took 2572853ms
Step 2 took 495384ms
********** Factor found in step 2: 6901216084212062896491856436448111443188245170307294941500166249
Found prime factor of 64 digits: 6901216084212062896491856436448111443188245170307294941500166249
Composite cofactor ((2^1361+1)/228211667657412909230323001705434042549018058879196001936615244070298287105666185870832703670953992780536531240215594078779119204857385398683700824873931077687558812068274836107)/6901216084212062896491856436448111443188245170307294941500166249 has 170 digits
I'm going to take the remaining c170 via GNFS.
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