Primitive root modulo n
- 原根（在数论，特别是整除理论中，原根是一个很重要的概念）
Primitive root modulo n
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abstract:
In modular arithmetic, a branch of number theory, a number g is a primitive root modulo n if every number coprime to n is congruent to a power of g modulo n. In other words, g is a generator of the multiplicative group of integers modulo n.
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