Primes of the P pentomino

[P pentomino]

2 × 5 (smallest rectangle)
7 × 15 (smallest odd rectangle)
complete

smallest rectangle: 2 × 5

[2 x 5 rectangle]


smallest odd rectangle: 7 × 15

[7 x 15 rectangle]

Klarner [1, Figure 11] originally gave the 7 × 15 rectangle.

Also see Torsten Sillke's P pentomino page.

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.