We prove that an odd number n is an Euler pseudoprime for exactly one half of the admissible bases if and only if n is a special Carmichael number, that is, a n?1 2 ≡ 1 mod n for every invertible a ∈ Zn.
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机译:我们证明奇数N是euler伪伪伪,用于允许允许的基地的一半,如果n是特殊的Carmichael号码,即每种可逆A Zn的N?1 2÷1 mod n。
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