N

Op-Six

MCG-Six

CR-Six

Error

Order

Error

Order

Error

Order

32

2.498e−6

-

2.278e−6

-

8.927e−7

-

64

4.582e−8

5.77

3.624e−8

5.97

1.362e−8

6.03

128

7.663e−10

5.90

5.710e−10

5.99

2.105e−10

6.02

256

1.237e−11

5.95

8.962e−12

5.99

3.271e−12

6.01