請幫我找出質數的規律
thx
更新1:
沒規律的回答不會被採用.....
質數的規律
回答 (4)
2007-04-08 11:08 pm
✔ 最佳答案
根據質數定理(prime number theorem)由1至N的質數數目約等於N/ln(N)
另外,所有大於3的質數可分為4n+1和4n+3兩類,而第一類可表示為兩數平方和(e.g5=1+2^2)
第二類則不能
最後,現在我們還沒有完全了解質數
參考: me
2007-04-10 12:30 am
prime number theorem is not about the "general equation" of prime number
obviously, any prime number larger than 3 is odd, when divided by 4, the remainder must be either 1 or 3....
4n + 1 can be expressed as the summation of two squares is nothing about prime!
obviously, any prime number larger than 3 is odd, when divided by 4, the remainder must be either 1 or 3....
4n + 1 can be expressed as the summation of two squares is nothing about prime!
2007-04-08 9:14 pm
n² + n + 41 必定為質數 ???
哪麼 n = 41 呢？
41² + 41 + 41
= 41( 41 + 1 + 1 )
= 41 x 43
顯然不是質數﹗﹗﹗
質數並無規律啊。
哪麼 n = 41 呢？
41² + 41 + 41
= 41( 41 + 1 + 1 )
= 41 x 43
顯然不是質數﹗﹗﹗
質數並無規律啊。
2007-04-08 9:07 pm
質數是沒有特別的規律的﹑
雖然開始的幾個看似有規律﹑
但到了很大的數時就會發現沒有一定的規律的了
質數﹑只是純粹除了1和自己以外不能被整除而已
雖然開始的幾個看似有規律﹑
但到了很大的數時就會發現沒有一定的規律的了
質數﹑只是純粹除了1和自己以外不能被整除而已
參考: me =]
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