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Task/Almost-prime/PicoLisp/almost-prime.l

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+(de factor (N)
+   (make
+      (let
+         (D 2
+            L (1 2 2 . (4 2 4 2 4 6 2 6 .))
+            M (sqrt N) )
+         (while (>= M D)
+            (if (=0 (% N D))
+               (setq M
+                  (sqrt (setq N (/ N (link D)))) )
+               (inc 'D (pop 'L)) ) )
+         (link N) ) ) )
+
+(de almost (N)
+   (let (X 2  Y 0)
+      (make
+         (loop
+            (when (and (nth (factor X) N) (not (cdr @)))
+               (link X)
+               (inc 'Y) )
+            (T (= 10 Y) 'done)
+            (inc 'X) ) ) ) )
+
+(for I 5
+   (println I '-> (almost I) ) )
+
+(bye)