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Numbers that can be factored down into 2 and only 2 prime numbers, such as:

25 (5 * 5) 9 (3 * 3) 12752041 (3571 * 3571) 

Is there a mathematical term for these numbers? I did a bit of Googling, but it's tough to search for what something is called.

Update: To clarify, I meant the square of a single prime number. So n * n where n is prime.

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    Thanks! Though @cassandra0's answer was helpful too. I'm learning about cryptography, and semiprimes come up quite a bit.2012-11-28

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The phrase "prime power" is usually used to refer to numbers of the form $p^n$ with $p$ prime and $n \geq 1$. I imagine "prime squared" or "prime square" is the most reasonable name for what you're describing.