4 × 4 (smallest rectangle)

5 × 16

6 × 8

7 × 16

complete

smallest rectangle: 4 × 4

All the prime rectangles for this octomino were determined by Klarner [1, Theorem 6 and Figure 15].

**Reference**

[1] David A. Klarner,
Packing a
Rectangle with Congruent *N*-ominoes,
*Journal of Combinatorial Theory* **7** (1969) pp. 107-115.

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Updated August 23, 2011.