 I = ITERATION NUMBER
 EI = ESTIMATED INTEGRAL
 I =  512
 EI =    0.9977403526167160
 I =  1024
 EI =    0.9997283042920412
 I =  2048
 EI =    0.9991515530877914
 I =  4096
 EI =    0.9998810848129468
 Total time elapsed =    0.4800000
