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Re:做了N久，是因为一句话没理解。。。。。。汗了

Posted by huxinjie800 at 2009-07-24 15:09:21 on Problem 3292
In Reply To:做了N久，是因为一句话没理解。。。。。。汗了 Posted by:Berry at 2007-08-08 19:43:58

> An H-semi-prime is an H-number which is the product of exactly two H-primes:
> 一个H-semi-prime是一个这样的H-number，它正好能表示成两个H-primes的乘积，但这种表示法可以不唯一,同时，它不能表示为3个或者以上H-number的乘积。。。。。所以441=21*21=9*49也是一个H-semi-prime
>我也汗了。。。。。。。。。。。。。。。

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Re:做了N久，是因为一句话没理解。。。。。。汗了 (28) hzw_0106 2009-08-30 00:10:17

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