Thread: YAFU 2.0
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Old 2021-08-18, 18:59   #169
BudgieJane
 
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"Jane Sullivan"
Jan 2011
Beckenham, UK

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I've just run the C108 cofactor of 73+34.59 through yafu 2.06, although I'm sure any of the previous versions would show the same behaviour.

Code:
08/18/21 19:43:23, 
08/18/21 19:43:23, ****************************
08/18/21 19:43:23, Starting factorization of 806612539887522076624435765094947314651498682479207276130902929847315087082262158953156473845821936013965643
08/18/21 19:43:23, using pretesting plan: normal
08/18/21 19:43:23, using tune info for qs/gnfs crossover
08/18/21 19:43:23, ****************************
08/18/21 19:43:23, rho: x^2 + 3, starting 1000 iterations on C108
08/18/21 19:43:23, prp11 = 40061753549
08/18/21 19:43:23, rho: x^2 + 3, starting 1000 iterations on C98
08/18/21 19:43:23, rho: x^2 + 2, starting 1000 iterations on C98
08/18/21 19:43:23, rho: x^2 + 1, starting 1000 iterations on C98
08/18/21 19:43:24, pm1: starting B1 = 150K, B2 = gmp-ecm default on C98
08/18/21 19:43:24, current ECM pretesting depth: 0.00
08/18/21 19:43:24, scheduled 30 curves at B1=2000 toward target pretesting depth of 30.15
08/18/21 19:43:24, Finished 30 curves using GMP-ECM method on C98 input, B1=2k, B2=gmp-ecm default
08/18/21 19:43:24, current ECM pretesting depth: 15.18
08/18/21 19:43:24, scheduled 74 curves at B1=11000 toward target pretesting depth of 30.15
08/18/21 19:43:25, Finished 74 curves using GMP-ECM method on C98 input, B1=11k, B2=gmp-ecm default
08/18/21 19:43:25, current ECM pretesting depth: 20.24
08/18/21 19:43:25, scheduled 214 curves at B1=50000 toward target pretesting depth of 30.15
08/18/21 19:43:29, Finished 214 curves using GMP-ECM method on C98 input, B1=50k, B2=gmp-ecm default
08/18/21 19:43:29, pm1: starting B1 = 3750K, B2 = gmp-ecm default on C98
08/18/21 19:43:30, current ECM pretesting depth: 25.33
08/18/21 19:43:30, scheduled 402 curves at B1=250000 toward target pretesting depth of 30.15
08/18/21 19:43:52, prp28 = 2606325622300954201341849509 (curve 284 stg2 B1=250000 sigma=3962908428 thread=11)
08/18/21 19:43:53, Finished 294 curves using GMP-ECM method on C98 input, B1=250k, B2=gmp-ecm default
08/18/21 19:43:53, final ECM pretested depth: 28.75
08/18/21 19:43:53, scheduler: switching to sieve method
08/18/21 19:43:53, starting SIQS on c70: 7725139683897973308307472537355787653622803183466786522414544405964523
08/18/21 19:43:53, random seed: 2108661816
08/18/21 19:43:53, prp70 = 7725139683897973308307472537355787653622803183466786522414544405964523
08/18/21 19:43:53, Total factoring time = 30.2247 seconds
My question is: Having finished the GMP-ECM method on C98 and now noticing what we are testing is C70, why not do a PRP test before starting SIQS and selecting a random seed, etc.?
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