Lowest number that isn't 4 or 5 modulo 9. There are numbers that can't be expres... | Hacker News

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timerol on Sept 6, 2019 | parent | context | favorite | on: 42 is found to be the sum of three cubes

Lowest number that isn't 4 or 5 modulo 9. There are numbers that can't be expressed, the open question is whether all other numbers can be expressed

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