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// ticket #3502
object Test {
object GeneratePrimeFactorsLazy extends (Int => List[Int]) {
override def apply(n:Int) = {
val s = Stream.range(2, n / 2).filter(n % _ == 0)
//val s = for (i <- Stream.range(2, n / 2); if n % i == 0) yield i
s.headOption.map(x => x :: apply(n / x)).getOrElse(List(n))
}
}
def main(args:Array[String]) {
// a prime number
//val num = 623456789
val num = 2796203
assert(GeneratePrimeFactorsLazy(num) == List(num))
}
}
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