Table 5.1.

Comparison of the electrostatic solvation energy G_pol (kcal/mol) and computation time (second) of the fast summation method (A) and the trivial summation method (B). M is the number of atoms. N_e is the number of patches, N is the number of integration points. n, σ, and m are parameters in the fast summation method. ε is the relative percentage error $\mid (G_{\mathit{pol}}^A-G_{\mathit{pol}}^B)/G_{\mathit{pol}}^B\mid$.

Protein ID		1CGI_l	1BGX	1DE4	1N2C
M		852	19,647	26,003	39,946
Ne		29,108	112,636	105,288	83,528
N		116,432	450,544	421,152	334,112
n		100	100	100	100
σ		2	2	2	2
m		4	4	4	4
A	Gpol	−1380.988	−19734.848	−25754.552	−41408.959
	timing	86	358	863	631
B	Gpol	−1343.150	−19297.528	−25388.455	−40675.383
	timing	49	4327	5368	9925
ε		2.8%	2.3%	1.4%	1.8%