Obviously easy
Number Theory
Level
pending
What is the smallest non-square positive integer that is the product of four prime numbers (not necessarily distinct)?
The answer is 24.
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1 solution
Moderator note:
Good approach used. What is the third smallest integer that is the product of 4 primes?
The smallest two integers that are the product of four primes are 1 6 = 2 4 and 2 4 = 2 3 × 3 Since 1 6 is a perfect square and 2 4 is not, the answer is 2 4 .