[数论] $2^n-1$是合数

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hbghlyj Post time 2023-9-8 13:41 |Read mode

证明存在无穷多素数$n$，使得$2^n-1$是合数
例如$2^{11}-1$=2047＝23×89.

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2025-3-6 21:42 GMT+8

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