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2020-07-15, 22:40   #474
rogue

"Mark"
Apr 2003
Between here and the

595310 Posts

Quote:
 Originally Posted by bchaffin I found another repunit which fails repeatedly when run with special modular reduction. This is using pfgw4.0.1, which uses square_carefully for the last 50 iterations. (See post https://www.mersenneforum.org/showpo...&postcount=415 for a previous case.) In this case the offender is (10^4568899-1)/9: Code: Detected in MAXERR>0.45 (round off check) in prp_using_gwnum Iteration: 15177501/15177550 ERROR: ROUND OFF 0.5>0.45 PFGW will automatically rerun the test with -a1 ... Detected in MAXERR>0.45 (round off check) in prp_using_gwnum Iteration: 15177501/15177550 ERROR: ROUND OFF 0.5>0.45 PFGW will automatically rerun the test with -a6 (10^4568899-1)/9 ERROR DURING PROCESSING! (96541.0526s+0.0304s)
This could be a gwnum issue. Maybe George can comment on it. If anything I could set the number of "last" iterations to something more dynamic so that as the number of bits increases the number of "careful" steps increases.