step1:
B1=11000:	time=0.01353666*x^1.48952895		R^2=0.99307716
B1=50000:	time=0.03292003*x^1.59110499		R^2=0.98883078
B1=250000:	time=0.15107094*x^1.60548554		R^2=0.99210142
B1=1000000:	time=0.63360887*x^1.59854616		R^2=0.99282461
B1=3000000:	time=0.75370188*x^1.75780045		R^2=0.99575497
B1=11000000:	time=2.55914140*x^1.77022161		R^2=0.99626035
B1=43000000:	time=9.70605420*x^1.77526062		R^2=0.99635213

step2:
B2=52566	time= 0.00010538*x^2.20000902		R^2=0.91111582
B2=493686	time= 0.02501595*x^1.54838102		R^2=0.99435065
B2=5257572	time= 0.30374674*x^1.36623061		R^2=0.99387529
B2=31517652	time= 1.05931068*x^1.35051173		R^2=0.99542908
B2=174780070	time= 3.11479559*x^1.36971198		R^2=0.99217184
B2=1055538342	time=11.42502284*x^1.34648650		R^2=0.99542994
B2=8600553790	time=39.49310988*x^1.34769267		R^2=0.99549779


step1:
digits=100:	time=0.00088993*B1			R^2=0.99990655
digits=200:	time=0.00262311*B1			R^2=0.99999697
digits=300:	time=0.00538827*B1			R^2=0.99999886
digits=400:	time=0.00908106*B1			R^2=0.99999695
digits=500:	time=0.01307063*B1			R^2=0.99999604
digits=600:	time=0.01855273*B1			R^2=0.99999431
digits=700:	time=0.02400505*B1			R^2=0.99999316
digits=800:	time=0.03074851*B1			R^2=0.99999350
digits=900:	time=0.04622979*B1			R^2=0.99995309
digits=1000:	time=0.05134455*B1			R^2=0.99999256

step2:
digits=100:	time=0.00053159*B2^0.78870409		R^2=0.96867551
digits=200:	time=0.03233221*B2^0.62027790		R^2=0.99864113
digits=300:	time=0.04338869*B2^0.62993446		R^2=0.99877421
digits=400:	time=0.07438992*B2^0.62386965		R^2=0.99835853
digits=500:	time=0.09679581*B2^0.62540577		R^2=0.99908723
digits=600:	time=0.13029643*B2^0.62491425		R^2=0.99914364
digits=700:	time=0.18889453*B2^0.61819466		R^2=0.99887351
digits=800:	time=0.23638128*B2^0.62013484		R^2=0.99838155
digits=900:	time=0.29725273*B2^0.61485839		R^2=0.99853672
digits=1000:	time=0.40173227*B2^0.60807763		R^2=0.99807956