RosettaCodeData/Task/Modular-exponentiation/Common-Lisp/modular-exponentiation-2.lisp

;; CLISP provides EXT:MOD-EXPT
(let ((a 2988348162058574136915891421498819466320163312926952423791023078876139)
      (b 2351399303373464486466122544523690094744975233415544072992656881240319))
  (format t "~A~%" (mod-expt a b (expt 10 40))))