That's an infinite list.
All numbers that are the square of primes have exactly 3 factors.
By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.
The squares of all prime numbers above 2 have exactly 3 factors.
Squares of prime numbers have exactly three factors.
Numbers with exactly three factors are squares of prime numbers.
30, 42, 66, 70, 78
Prime squares
The prime numbers required are 2, 3, 5 and 7
All the numbers less than 100 that are the product of exactly three different prime numbers are 30, 42, 66, 70, and 78. Need to know how to get the answer
4, 9, 25 and 49 They are squares of prime numbers.
No.
How about: 2*3*5 = 30 which is the product of the 1st three prime numbers