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Volume: —
Surface area: —
Enter dimensions, then adjust until you match the prime shape.
Prime number
What is a prime shape?
For a block with volume N (built from N unit cubes), the prime
shape is the arrangement with the least surface area.
- Dimensions multiply to N (volume).
- Surface area is minimized (smallest exposed faces).
- Ties pick the shape closest to a cube (smallest max side).
- Axes ordered: Height ≥ Width ≥ Depth.
* We cap N at 32,768 (≈ 32×32×32) to keep rendering fast.