-------------- pseudo-random: -------------
N	= 1000000
result	= 1.00588
exact	= 1
estimated error	= 0.00640612
actual error	= 0.00588112
-------------- lattice: -------------
N	= 1000000
result	= 1.00107
exact	= 1
estimated error	= 0.00134274
actual error	= 0.0010733
-------------- halton: -------------
N	= 1000000
result	= 0.998163
exact	= 1
estimated error	= 0.00646131
actual error	= 0.00183664