有趣的数学【26】:自私的质数

in #steempress5 years ago

质数(prime number)又称素数,有无限个。

质数定义为在大于1的自然数中,除了1和它本身以外不再有其他因数。

这有点像我们在日常生活中碰到的那些自私的人,他们为了避免有人来问他借钱,或者是请求帮助,就尽量避免和别人有所交集,因此他的朋友,只有他自己,他也最爱自己。

虽然这是一群自私的数字,但是,针对它们的研究还真是不少。

  • 大名鼎鼎的哥德巴赫猜想就是关于质数的:
任一大于2的偶数都可写成两个质数之和。
  • 黎曼猜想
黎曼猜想是波恩哈德·黎曼1859年提出的,他向柏林科学院提交了一篇题为“论小于给定数值的素数个数”的论文。这就是黎曼猜想的雏形。
关于质数的应用也有很多,比如在密码学应用中,汽车齿轮设计中,甚至于在杀虫剂的使用次数中国,都能看到质数的踪迹。

下面,我们来看一道题目,它也和质数有关:
image

具体的解题步骤我就不一一说明了,因为步骤不难,看过程就可以很清楚了:
image

可以看出,这道题最后的重点是,8044已经分成了3个质数的乘积,再也没有别的可能性了,因此就能得到确定的a,b,c的唯一值,从而就能求出最后的a+b+c的值了。

所以说,质数虽然比较自私,但是有时候他们还是能够组合在一起解决很多问题的。

生活中自私的人也是一样,只要我们善于利用,总能发挥出他们的作用。


参考文献:

百度百科:质数

百度百科:哥德巴赫猜想

百度百科:黎曼猜想

 


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