cannonball problem

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Proper noun

1. {{lb|en|math}} The [[challenge]] of proving that the only solution of the [[Diophantine equation]] :<math>\sum_{n=1}^{N} n^2 = M^2\;</math> with ''N'' > 1 is when ''N'' = 24 and ''M'' = 70.

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