problem 47 // project euler

Distinct primes factors

The first two consecutive numbers to have two distinct prime factors are:

The first three consecutive numbers to have three distinct prime factors are:

Find the first four consecutive integers to have four distinct prime factors. What is the first of these numbers?

不同的质因数

首次出现连续两个数均有两个不同的质因数是在：

首次出现连续三个数均有三个不同的质因数是在：

首次出现连续四个数均有四个不同的质因数时，其中的第一个数是多少？