70
No
The largest integer that is not the product of two or more different primes would be the largest prime number. Because there are an infinite number of prime numbers, there is no largest integer that is not the product of two or more different primes.
36.
216
The least number that is the product of two different primes that are squared is 6. This is because 6 is the product of 2 (which is squared as 2^2) and 3 (which is squared as 3^2), both of which are prime numbers. Any smaller number would not be the product of two different primes that are squared.
Since there are infinitely many primes, there are infinitely many numbers that are products of 3 primes.
3
95 is the product of two primes, 5 and 19.
59 is a prime number.
Yes, always. This is the easiest way to find the LCM of two (or indeed any number of) primes.
no the smallest number that is divisible by four different primes would be 210
Writing a number as the product of its prime factors is called prime factorization.