y = 3: powers of 3 mod 7: 1, 3, 2, 6, 4, 5, 1, ...  period = 6

% ./Shor 7 4
Shor: N = 7, default L = 6
Shor: N = 7, L = 4, K = 3, y = 3
Shor: m = 93, k = 5
reduce: (0,0) (0,0) (0,0) (0,0) (0,0) (0.707107,0) (0,0) (0,0) (0,0) (0,0) (0,0) (0.707107,0) (0,0) (0,0) (0,0) (0,0)

period = 6 can be seen in reduce result

---

y = 2: powers of 2 mod 7: 1, 2, 4, 1, ...  period = 3

% ./Shor 7 4
Shor: N = 7, default L = 6
Shor: N = 7, L = 4, K = 3, y = 2
Shor: m = 116, k = 4
reduce: (0,0) (0,0) (0.447214,0) (0,0) (0,0) (0.447214,0) (0,0) (0,0) (0.447214,0) (0,0) (0,0) (0.447214,0) (0,0) (0,0) (0.447214,0) (0,0)
vecr%

period = 3 can be seen in reduce result