Square which is 2 Less than Cube/Historical Note
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Historical Note on Square which is 2 Less than Cube
The fact that $25$ is the only Square which is 2 Less than Cube was stated without proof by Pierre de Fermat.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $25$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $25$