Created
February 7, 2010 12:58
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(defn take-potential-divisors [p coll] | |
"Takes only those number from coll, whose square less or equal than p" | |
(take-while #(>= p (* % %)) coll)) | |
(defn prime? [p coll] | |
"Test whether p is prime or not. coll - prime numbers less than p" | |
(nil? (some #(zero? (rem p %)) | |
(take-potential-divisors p coll)))) | |
(def primes (lazy-cat [2 3] | |
(filter #(prime? % primes) | |
(range 5 100)))) | |
primes | |
;; -> 2 3 5 7 11 13 17 19 23 25 29 31 35 37 41 43 47 53 59 61 67 71 73 79 83 89 97 but 25 and 35 aren't primes |
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