step1:
B1=11000:	time=0.00475759*x^1.70530259		R^2=0.98520603
B1=50000:	time=0.03134839*x^1.65116003		R^2=0.98854006
B1=250000:	time=0.14334362*x^1.66538645		R^2=0.99061461
B1=1000000:	time=0.56875257*x^1.66654715		R^2=0.99060661
B1=3000000:	time=0.85126442*x^1.78944188		R^2=0.99605256
B1=11000000:	time=2.95496787*x^1.79853897		R^2=0.99648012

step2:
B2=52566	time= 0.02379749*x^1.40083554		R^2=0.98524510
B2=493686	time= 0.04867947*x^1.47632216		R^2=0.99623403
B2=5257572	time= 0.37404646*x^1.37936465		R^2=0.99295438
B2=31517652	time= 1.85301310*x^1.30156732		R^2=0.99429738
B2=174780070	time= 5.98039756*x^1.29870970		R^2=0.99403475
B2=1055538342	time=21.69952153*x^1.27120173		R^2=0.99497809

step1:
digits=100:	time=0.00118497*B1			R^2=0.99910573
digits=200:	time=0.00350126*B1			R^2=0.99999994
digits=300:	time=0.00771301*B1			R^2=0.99991793
digits=400:	time=0.01178620*B1			R^2=0.99995699
digits=500:	time=0.01725248*B1			R^2=0.99991919
digits=600:	time=0.02421353*B1			R^2=0.99990083
digits=700:	time=0.03656367*B1			R^2=0.99975343
digits=800:	time=0.04754784*B1			R^2=0.99989074
digits=900:	time=0.05923427*B1			R^2=0.99987311
digits=1000:	time=0.07049665*B1			R^2=0.99988979

step2:
digits=100:	time=0.01159498*B2^0.64826561		R^2=0.99703932
digits=200:	time=0.04934996*B2^0.60969264		R^2=0.99479056
digits=300:	time=0.06787937*B2^0.61890929		R^2=0.99903288
digits=400:	time=0.09522349*B2^0.62357035		R^2=0.99870781
digits=500:	time=0.13840124*B2^0.61802477		R^2=0.99912024
digits=600:	time=0.16431038*B2^0.62321216		R^2=0.99938525
digits=700:	time=0.30651251*B2^0.60303481		R^2=0.99901607
digits=800:	time=0.37527312*B2^0.60494185		R^2=0.99894175
digits=900:	time=0.49215245*B2^0.59717187		R^2=0.99859380
digits=1000:	time=0.62691861*B2^0.59184215		R^2=0.99821126