20	.007861  ordinary MM: size, seconds
30	.022051
40	.050391
60	.15922
80	.4031
120	1.53
160	3.915
240	18.55
320	78.28
480	279.24

20	.006611  Strassen: size, seconds
30	.020820
40	.049219
60	.163281
80	.3975
120	1.3125
160	3.04
240	9.95
320	22.17
480	72.60