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单词 NFSNET
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NFSNET

中文百科

普通数域筛选法 General number field sieve

(重定向自NFSNET)

在数论中,普通数域筛选法(GNFS)是已知效率最高的分解整数的算法。分解整数n需要

O\left\{\exp\left[\left({64\over9}\log n\right)^{1\over3} (\log \log n)^{2\over3}\right]\right\}

步(参见大O符号)。它是从特殊数域筛选法引申出来的。如果条件数域筛没有限定条件,就是指普通数域筛选。

英语百科

General number field sieve 普通数域筛选法

(重定向自NFSNET)

In number theory, the general number field sieve (GNFS) is the most efficient classical algorithm known for factoring integers larger than 10^{100}. Heuristically, its complexity for factoring an integer n (consisting of \left\lfloor \log_2 n\right\rfloor + 1 bits) is of the form

(in L-notation), where ln is the natural logarithm. It is a generalization of the special number field sieve: while the latter can only factor numbers of a certain special form, the general number field sieve can factor any number apart from prime powers (which are trivial to factor by taking roots). When the term number field sieve (NFS) is used without qualification, it refers to the general number field sieve.

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更新时间:2025/6/21 0:15:08