Semiprime: Difference between revisions
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=={{header|Common Lisp}}== |
=={{header|Common Lisp}}== |
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<lang |
<lang lisp>(defun semiprimep (n &optional (a 2)) |
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(cond ((> a (isqrt n)) nil) |
(cond ((> a (isqrt n)) nil) |
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((zerop (rem n a)) (and (primep a) (primep (/ n a)))) |
((zerop (rem n a)) (and (primep a) (primep (/ n a)))) |
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