N = 125
[C1] non-units [C2] #non-units lead to same
#solution for discriminant
[C3] #solution for discriminant
= non-units in C1
75, 50 2 350
0 1 225
5, 115, 45, 30, 90, 15, 70, 100, 105, 10, 20, 25, 85, 60, 120, 40, 80, 55, 65, 95, 35, 110 22 100
C2TC3 = #ways delta can be non-unit 3125
Total non-singular EC over Z125 = 1252 - #ways delta can be non-unit (C2TC3) = 12500