A query that has only got two different prime factors

QuantumNet

Yes, ofcourse, a primenumber is a number that can only be divided with itself and 1.

But what do you call a query that has only got two different prime factors?

9 has got the factors 9, 3 and 1. But has only two different prime factors. 9 = 3*3, so the query has got the prime factors 3 and 1.

27 has also only got two prime factors, 3 and 1

aswell as 3.

0 and 1 has got one prime factor

0 1 2 3 4 5 7 8 9 11 13 16.... has got two prime factors etc.

MathematicalPhysicist

1 isnt a prime therefore it cannot be a prime factor of any number.

mathman

Powers of a prime don't have any special name except "power of a prime".

Sariaht

Then 2,3,5,7,11 and thirteen are not primes either.

Hurkyl

Every number is a factor of 0.

Sariaht

I agree, totally!