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Jul 20th, 2018
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  1. (defun iscomposite (testnum)
  2. (setq i 2)
  3. (loop
  4. (when (= i testnum)
  5. (return-from iscomposite nil))
  6. (if (= (mod testnum i) 0)
  7. (return-from iscomposite t))
  8. (setq i (+ i 1))))
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