Contents

# Prime Factors

Compute the prime factors of a given natural number.

A prime number is only evenly divisible by itself and 1.

Note that 1 is not a prime number.

## Example

What are the prime factors of 60?

- Our first divisor is 2. 2 goes into 60, leaving 30.
- 2 goes into 30, leaving 15.
  - 2 doesn't go cleanly into 15. So let's move on to our next divisor, 3.
- 3 goes cleanly into 15, leaving 5.
  - 3 does not go cleanly into 5. The next possible factor is 4.
  - 4 does not go cleanly into 5. The next possible factor is 5.
- 5 does go cleanly into 5.
- We're left only with 1, so now, we're done.

Our successful divisors in that computation represent the list of prime
factors of 60: 2, 2, 3, and 5.

You can check this yourself:

- 2 * 2 * 3 * 5
- = 4 * 15
- = 60
- Success!

The Scala exercises assume an SBT project scheme. The exercise solution source
should be placed within the exercise directory/src/main/scala. The exercise
unit tests can be found within the exercise directory/src/test/scala.

To run the tests simply run the command `sbt test` in the exercise directory.

For more detailed info about the Scala track see the [help
page](http://exercism.io/languages/scala).


## Source

The Prime Factors Kata by Uncle Bob [http://butunclebob.com/ArticleS.UncleBob.ThePrimeFactorsKata](http://butunclebob.com/ArticleS.UncleBob.ThePrimeFactorsKata)

## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.

Version data entries

183 entries across 183 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.179	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.178	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.177	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.176	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.175	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.174	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.173	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.172	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.171	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.170	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.169	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.167	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.166	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.165	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.164	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.163	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.162	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.161	tracks/scala/exercises/prime-factors/README.md
trackler-2.2.1.160	tracks/scala/exercises/prime-factors/README.md