素数のときに":counted!"と表示する

PrimeList.groovy

def MaxNumber = 100
def NotPrime = []

(1..MaxNumber).each {
    print it
    if ((it >1) && (NotPrime[it] != 1 )) {
        for (def num = it * 2; num <= MaxNumber; num+= it) {
            NotPrime[num] = 1
        }
        println ":counted!"
    } else {
        println ""
    }
}