Imperative vs declarative prime numbers

Declarative Clojure

(defn factor-of?
  [n d]
  (= (mod n d) 0))

(defn possible-factors-of
  [n]
  (range 2 n))

(defn prime? [n]
  (cond 
   (<= n 2) false
   :else    (not (some #(factor-of? n %) (possible-factors-of n)))))

(doseq [p (filter prime? (range 100))]
  (println p))

Imperative Python

for i in range(100):
  if i >= 2:
    prime = True
    for possible_factor in range(2, i):
      if i % possible_factor == 0:
        prime = False
    if prime:
      print i