step1:
B1=11000:	time= 0.03518019*x^1.74950481		R^2=0.99611820
B1=50000:	time= 0.16077431*x^1.74947521		R^2=0.99568086
B1=250000:	time= 0.79577399*x^1.75192859		R^2=0.99572088
B1=1000000:	time= 3.17592253*x^1.75271210		R^2=0.99572893
B1=3000000:	time= 9.39928974*x^1.75553143		R^2=0.99570019
B1=11000000:	time=34.73109961*x^1.75492475		R^2=0.99577243

step2:
B2=1873422	time=  0.20273678*x^1.36455445		R^2=0.99354271
B2=12746592	time=  0.95213194*x^1.33198339		R^2=0.99126510
B2=128992510	time=  4.85960903*x^1.29771334		R^2=0.99241287
B2=1045563762	time= 18.98352165*x^1.31521982		R^2=0.99313698
B2=5706890290	time= 62.37216935*x^1.26000282		R^2=0.99419102
B2=35133391030	time=189.40894746*x^1.27563349		R^2=0.99319498

step1:
digits=100:	time=0.01163064*B1			R^2=0.99999759
digits=200:	time=0.03209129*B1			R^2=0.99999970
digits=300:	time=0.06766154*B1			R^2=0.99999682
digits=400:	time=0.10991670*B1			R^2=0.99999652
digits=500:	time=0.15411711*B1			R^2=0.99999200
digits=600:	time=0.21664091*B1			R^2=0.99999881
digits=700:	time=0.31537211*B1			R^2=0.99999743
digits=800:	time=0.42849614*B1			R^2=0.99999777
digits=900:	time=0.51899650*B1			R^2=0.99999919
digits=1000:	time=0.61553657*B1			R^2=0.99999739

step2:
digits=100:	time=0.01219208*B2^0.64672115		R^2=0.99874497
digits=200:	time=0.02561798*B2^0.64513340		R^2=0.99894702
digits=300:	time=0.04610321*B2^0.63981458		R^2=0.99881710
digits=400:	time=0.06667051*B2^0.64179635		R^2=0.99874006
digits=500:	time=0.10137253*B2^0.63463204		R^2=0.99883851
digits=600:	time=0.15133426*B2^0.62907392		R^2=0.99854064
digits=700:	time=0.20464924*B2^0.62634144		R^2=0.99871118
digits=800:	time=0.23291481*B2^0.63123307		R^2=0.99819691
digits=900:	time=0.28027494*B2^0.62868012		R^2=0.99831673
digits=1000:	time=0.31722829*B2^0.63008545		R^2=0.99846319