即将离开知乎
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http://mathoverflow.net/questions/130783/reasons-to-prefer-one-large-prime-over-another-to-approximate-characteristic-zer
您即将离开知乎,请注意您的帐号和财产安全。
http://mathoverflow.net/questions/130783/reasons-to-prefer-one-large-prime-over-another-to-approximate-characteristic-zer