2 × 2

3 × 3

2 × 3

2 × 5

3 × 5

2 × 11

3 × 11

2 × 7

3 × 7

2 × 13

3 × 13

Etc.

Yes

No

√

√

√

√

√

√

√

√

√

√

√

5 × 5

7 × 7

5 × 7

5 × 11

7 × 11

5 × 13

7 × 13

11 × 13

5 × 17

7 × 17

17 × 13

Etc.

Yes

√ H2

√

√

√ H1

√

√ H1

√

√ H1

√ H2

√

√ H1

No