step1: B1=11000: time= 0.03489964*digits^1.71038107 R^2=0.99899145 B1=50000: time= 0.15910904*digits^1.71037918 R^2=0.99881703 B1=250000: time= 0.78492699*digits^1.71278933 R^2=0.99889554 B1=1000000: time= 2.90160664*digits^1.72811773 R^2=0.99892196 B1=3000000: time= 8.62958602*digits^1.73305779 R^2=0.99903117 B1=11000000: time= 30.74497543*digits^1.73726832 R^2=0.99893088 B1=43000000: time=122.40191979*digits^1.73363068 R^2=0.99901228 step2: B2=1359460 time= 0.17809420*digits^1.31029304 R^2=0.99320114 B2=11757135 time= 1.06267236*digits^1.26733953 R^2=0.99124919 B2=116469998 time= 5.82055051*digits^1.25210916 R^2=0.99533543 B2=839549779 time= 20.65632067*digits^1.21566446 R^2=0.99720366 B2=4016636513 time= 55.83856061*digits^1.22197220 R^2=0.99640096 B2=25577181640 time=162.64484238*digits^1.24422063 R^2=0.99802236 B2=178426462987 time=349.18061426*digits^1.30569766 R^2=0.98463234 step1: digits=110: time=0.01054629*B1 R^2=0.99999843 digits=120: time=0.01160585*B1 R^2=0.99999922 digits=130: time=0.01307734*B1 R^2=0.99999528 digits=140: time=0.01448639*B1 R^2=0.99999859 digits=160: time=0.01748939*B1 R^2=0.99999517 digits=180: time=0.02299745*B1 R^2=0.99999584 digits=200: time=0.02918431*B1 R^2=0.99999690 digits=250: time=0.03932419*B1 R^2=0.99999929 digits=300: time=0.05574754*B1 R^2=0.99999516 digits=348: time=0.07484447*B1 R^2=0.99999277 digits=402: time=0.09187712*B1 R^2=0.99999343 digits=789: time=0.30455492*B1 R^2=0.99999904 digits=927: time=0.39620108*B1 R^2=0.99998419 step2: digits=110: time=0.01415826*B2^0.63598823 R^2=0.99801766 digits=120: time=0.01482702*B2^0.63724790 R^2=0.99803694 digits=130: time=0.01566970*B2^0.63794794 R^2=0.99810784 digits=140: time=0.01632287*B2^0.63994616 R^2=0.99825799 digits=160: time=0.01838764*B2^0.64058395 R^2=0.99786930 digits=180: time=0.02271783*B2^0.63757080 R^2=0.99799707 digits=200: time=0.02385490*B2^0.64100827 R^2=0.99815741 digits=250: time=0.03187215*B2^0.63885797 R^2=0.99844032 digits=300: time=0.03760011*B2^0.64133525 R^2=0.99847886 digits=348: time=0.05128785*B2^0.63810587 R^2=0.99786751 digits=402: time=0.06050002*B2^0.63731031 R^2=0.99807823 digits=789: time=0.14908417*B2^0.64145327 R^2=0.99890898 digits=927: time=0.22632096*B2^0.63060013 R^2=0.99815958