290 def generatePrimes (s: Stream[Int]): Stream[Int] =

   290 def generatePrimes (s: Stream[Int]): Stream[Int] =

   291   s.head #:: generatePrimes(s.tail filter (_ % s.head != 0))

   291   s.head #:: generatePrimes(s.tail filter (_ % s.head != 0))

   292 

   292 

   293 val primes: Stream[Int] = generatePrimes(Stream.from(2))

   293 val primes: Stream[Int] = generatePrimes(Stream.from(2))

   294 

   294 

   295 primes.filter(_ > 100).take(2000).toList

   297 primes.filter(_ > 100).take(2000).toList

   296 

   298 

   297 time_needed(1, primes.filter(_ > 100).take(2000).toList)

   299 time_needed(1, primes.filter(_ > 100).take(2000).toList)

   298 time_needed(1, primes.filter(_ > 100).take(2000).toList)

   300 time_needed(1, primes.filter(_ > 100).take(2000).toList)

   299 

   301