 I = ITERATION NUMBER
 EI = ESTIMATED INTEGRAL
 I =  512
 EI =  0.9957062293734682
 I =  1024
 EI =  0.998864951179457
 I =  2048
 EI =  0.9991789653087108
 I =  4096
 EI =  0.9999722196422461
 Total time elapsed =  0.029989865
