(defun get-random-state-values (s) (second (read-from-string (prin1-to-string s) t nil :start 2))) (defun test-random-state (state values) (let ((*random-state* state) (state-max (aref (get-random-state-values *random-state*) 0))) (check #'= 0 (mapcar #'(lambda (v) (random state-max) (- v (aref (get-random-state-values *random-state*) 1))) values)))) ; combined congruential (test-random-state '#$(1 #(2147483562 0 12345 67890)) '(2026359911 1950599823 315009702 1105313978 871469535 1575849876 94472070 728775444 2137747604 430227419)) ; superduper (test-random-state '#$(2 #(2147483647 0 0 12345 1 2354)) '(274318794 1445882217 174694986 21258797 860839904 1611788216 2056178182 1140888495 12651638 485726963)) ; combined tausworth (test-random-state '#$(3 #(2147483647 0 12345 67890)) '(702677384 51837197 1914342640 434186539 1381102196 1693194944 898066022 1288590140 645917234 1416028832))