prime number 判斷 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 ...

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一個大於1的自然數 如果除了1和它本身之外 再也沒有其他因數 我們就稱它為質數 prime number 例如 小於10的質數有2 3 5 7 另外 我們知道除了  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 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  2016年3月15日 把从2 开始的 某一范围内的正整数从小到大顺序排列 剩下的数中选择最小的素数 然后去掉它的倍数 依次类推 直到循环结束 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 

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  • mega_8517
    5.0 out of 5 starsVerified Purchase
    質數- 維基百科，自由嘅百科全書
    Reviewed in the Thailand on July 6, 2025
    一個大於1的自然數，如果除了1和它本身之外，再也沒有其他因數，我們就稱它為質數（prime number）。例如：小於10的質數有2, 3, 5, 7。另外，我們知道除了 ...
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  • player_2906
    1.0 out of 5 starsVerified Purchase
    質數(Prime Number)
    Reviewed in the Thailand on July 17, 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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  • gamer9356
    1.0 out of 5 stars
    C 练习实例33 – 质数（素数）判断
    Reviewed in the Thailand on June 25, 2025
    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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