Yet doubtless many a fine meadow favorably situated exists in almost prime beauty for thousands of years, the process of extinction being exceedingly slow, as we reckon time.
然而，毫无疑问，许多位置优越的优质草地几乎在最美的状态下存在了数千年，按照我们的时间计算，灭绝的过程非常缓慢。
| 单词 | Almost prime |
| 释义 |
Almost prime
原声例句
加州的群山（上） Yet doubtless many a fine meadow favorably situated exists in almost prime beauty for thousands of years, the process of extinction being exceedingly slow, as we reckon time. 然而，毫无疑问，许多位置优越的优质草地几乎在最美的状态下存在了数千年，按照我们的时间计算，灭绝的过程非常缓慢。
中文百科
殆素数数论中，一个自然数称为殆素数，当且仅当存在一个绝对常数K，使这个自然数最多有K个素因子。自然数n称为k次殆素数，当且仅当Ω(n) = k，其中Ω（n）是n的整数分解过程中的指数和： 因此，一个自然数是素数，当且仅当它是一次殆素数；一个自然数是半素数，当且仅当它是二次殆素数。k次殆素数的集合通常表示成Pk。开始的几个k次殆素数是：
英语百科
Almost prime 殆素数In number theory, a natural number is called almost prime if there exists an absolute constant K such that the number has at most K prime factors. An almost prime n is denoted by Pr if and only if the number of prime factors of n, counted according to multiplicity, is at most r. A natural number is called k-almost prime if it has exactly k prime factors, counted with multiplicity. More formally, a number n is k-almost prime if and only if Ω(n) = k, where Ω(n) is the total number of primes in the prime factorization of n: |
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