Ken's blog: More fun with factorization
Giving up for now of factoring the 135-digit leftover from M2281, taken to B1=94938494 via the auto-increment "-I 1" option and later runs at B2=3178397272066 (for 1 GB memory usage) with GMP ECM. The last command line was ecm/bin/ecm -one -c 0 -one -I 1 93168596 3e12 < 135-digit | tee 135-digit.8.log
Run 192 out of 0: Using B1=94938494, B2=3178397272066, polynomial Dickson(30), sigma=2613019741 Step 1 took 503220ms Step 2 took 446100ms
lf is the largest factor of m-1 : lf(m) = x=factor(m-1); y=matsize(x); x[y[1],1]
lf(lf(2^2281-1))
Hopefully gettable by GNFS in the future.
Turning attention to 2^1101+1.
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