step1:
B1=11000:	time= 0.00974486*x^1.58356124		R^2=0.99044273
B1=50000:	time= 0.05013548*x^1.56431084		R^2=0.99487283
B1=250000:	time= 0.26767064*x^1.55507451		R^2=0.99406550
B1=1000000:	time= 1.17013416*x^1.54159503		R^2=0.99331897
B1=3000000:	time= 1.64618525*x^1.66870958		R^2=0.99831648
B1=11000000:	time= 5.68014699*x^1.67839218		R^2=0.99841940
B1=43000000:	time=21.60287884*x^1.68300936		R^2=0.99843288

step2:
B2=52566	time= 0.02960550*x^1.33496871		R^2=0.98971043
B2=493686	time= 0.04874772*x^1.45395947		R^2=0.99241082
B2=5257572	time= 0.31420373*x^1.37966062		R^2=0.99029250
B2=31517652	time= 1.22857023*x^1.34247751		R^2=0.99362620
B2=174780070	time= 4.89730292*x^1.30452363		R^2=0.99340177
B2=1055538342	time=16.47112752*x^1.28939818		R^2=0.99446047
B2=8600553790	time=49.25644898*x^1.31140728		R^2=0.99402796


step1:
digits=100:	time=0.00128103*B1			R^2=0.99992198
digits=200:	time=0.00351618*B1			R^2=0.99999617
digits=300:	time=0.00712976*B1			R^2=0.99999958
digits=400:	time=0.01149485*B1			R^2=0.99999857
digits=500:	time=0.01683153*B1			R^2=0.99999683
digits=600:	time=0.02365399*B1			R^2=0.99999588
digits=700:	time=0.03084561*B1			R^2=0.99999513
digits=800:	time=0.03963520*B1			R^2=0.99999455
digits=900:	time=0.04875299*B1			R^2=0.99999409
digits=1000:	time=0.05861755*B1			R^2=0.99999304

step2:
digits=100:	time=0.01534507*B2^0.62380483		R^2=0.99818049
digits=200:	time=0.02838258*B2^0.62824821		R^2=0.99825000
digits=300:	time=0.06995746*B2^0.60891195		R^2=0.99787190
digits=400:	time=0.08389576*B2^0.61937597		R^2=0.99921469
digits=500:	time=0.12902516*B2^0.61288109		R^2=0.99944482
digits=600:	time=0.16628502*B2^0.61552219		R^2=0.99962196
digits=700:	time=0.23036326*B2^0.61015925		R^2=0.99952893
digits=800:	time=0.26561421*B2^0.61404794		R^2=0.99970772
digits=900:	time=0.36320934*B2^0.60624765		R^2=0.99959003
digits=1000:	time=0.45125587*B2^0.60282268		R^2=0.99955924