....x....x....x.
1000001
1100001
1010001
1110001
1001001 I II I III
1101001
1011001 P
1111001
1000101
1100101 P
1010101
1110101 P PP I
1001101 P
1101101
1011101 II
1111101 I
1000011
1100011 P P I
1010011 I
1110011 P PP P
1001011 P P
1101011
1011011 P PI P PPP
1111011
1000111 P
1100111
1010111
1110111
1001111 II
1101111 P
1011111 I P
1111111
Total irreducibles = 40
Total grid entries = 512
Percentage of irreducibles = 0.078125
Actual Probability of being primitive given irreducibility = 0.575
T&V's expected probability of being primitive given irreducibility = 0.7756143808