prime number 判斷 接下來要介紹的演算法有：從小到大列出質數（建立質數表）、判斷一個數是不是質數（質數測試）、使用乘法湊得給定的數（質因數分解）。 prime generation: sieve of Eratosthenes.

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用最淺白的說話去解釋 如果把n 除2 3 4 9 後 所有結果都是小數 n 必定是質數prime number 再用例子說明 假設我們要判斷73 是否質數 只須測試它可否被2 3 4 9 所整除  2018年6月10日 质数又称素数 一个大于1的自然数 除了1和它自身外 不能被其他自然数整除的数叫做质数 否则称为合数 0和1既不是质数也不是合数 最小的质数是2  2015年3月12日 1 把从2开始的 某一范围内的正整数从小到大顺序排列 2 剩下的数中选择最小的素数 然后去掉它的倍数 英文入面叫質數做prime number或者prime 大過1又唔係質數嘅自然數就叫合成數 合成數都係由大過1嘅自然數相乘而來 例如5 就係質數 因為要將5 寫做乘積嘅話 就一定  程序分析 质数 prime number 又称素数 有无限个 一个大于1的自然数 除了1和它本身外 不能被其他自然数整除 程序源代码  

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  • ultra5232
    5.0 out of 5 starsVerified Purchase
    質數(Prime Number)
    Reviewed in the Thailand on July 6, 2025
    2015年3月12日 — 1）把从2开始的、某一范围内的正整数从小到大顺序排列； 2）剩下的数中选择最小的素数，然后去掉它的倍数。
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  • ultra8681
    1.0 out of 5 starsVerified Purchase
    如何有效率地寫程式判斷質數和尋找質數？
    Reviewed in the Thailand on July 17, 2025
    2018年6月10日 — 质数又称素数。一个大于1的自然数，除了1和它自身外，不能被其他自然数整除的数叫做质数；否则称为合数。 · 0和1既不是质数也不是合数，最小的质数是2 ...
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  • pro_9965
    1.0 out of 5 stars
    算法：判断一个数n是不是素数(4种方法)
    Reviewed in the Thailand on June 25, 2025
    2018年10月14日 — 一個質數(Prime)是一個大於1，且無法找到除了自己本身和1之外的自然數能整除它的自然數。 舉例來說，2、3、5、7、11、13和17均為質數。 質數是數學上的難題 ...
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