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You may also see list of all polyomino sets for which data is available here.
Area: 5.
Perimeter: 12.
Size: 3x3.
Is rectangular: no.
Is convex: yes.
Holes: 0.
Prime rectangles: ≥ 0.
Blue number - strongly prime rectangle (which cannot be divided into two or more number of rectangles tileable by this set).
Green number - weakly prime rectangle (which cannot be divided into two rectangles tileable by this set, but which can be divided into three or more rectangles).
Purple number - prime rectangle (unknown if weakly or strongly prime).
Red number - composite rectangle (which can be divided into two rectangles tileable by this set).
Gray number - it is unknown whether rectangle is prime or composite.
Question mark (?) - solution count is unknown.
Click on underlined numbers to view picture with one solution.
Smallest torus (2x5):
Smallest square torus (5x5):
Smallest known odd torus (5x5):
Smallest Baiocchi figure (area 20):
Smallest known Baiocchi figure without holes (area 40):
