[valw]

I made the same remark in reply to another comment which used the phrase "factoring primes" :) Wikipedia does use the term "prime factorization": that seems legit to me, as prime is used as an adjective. https://en.wikipedia.org/wiki/Integer_factorization

[Karellen]

Another legitimate meaning might be "factoring probable primes" (or "candidate primes" as they are sometimes called in key generation/cryptanalysis), or possibly "factoring semiprimes".

Both of those phrases could be referred to as "prime factorisation" in a not-entirely-accurate-but-unambiguous-in-context shorthand.

https://en.wikipedia.org/wiki/Probable_prime

https://en.wikipedia.org/wiki/Semiprime