from random import randint from math import sqrt def est_premier(n): a = 2 while a < sqrt(n): if n%a == 0: return False else: a += 1 return True def nb_premier_suivant(n): m = n + 1 while est_premier(m) == False: m += 1 return m def encodage(chaine_a_coder,suite_encodage): chaine_codee = [] c = 0 while c < len(chaine_a_coder): intermediaire = str(bin(ord(chaine_a_coder[c]))) intermediaire = list(intermediaire) intermediaire = intermediaire.pop(intermediaire.inde"b")) intermediaire = "".join(intermediaire) print(intermediaire) i = 0 m = 0 while i < len(intermediaire) : m = m + (int(intermediaire[i]) * int(suite_encodage[i])) i += 1 chaine_codee.append(m) c += 1 return (chaine_codee) def choix_valeur_codante(prem): v = int(input("Veuillez choisir un entier v tel que : " + str(prem//2+1) + " < v < " + str(prem) + " : ")) while v >= prem or v <= (prem//2+1): v = int(input("Veuillez respecter les conditions sur v : " + str(prem//2+1) + " < v < " + str(prem) + " : ")) return v def choix_nb_premiers(somme_suite): rep = 'no' n = somme_suite while rep != 'yes' : n = nb_premier_suivant(n) rep = input('Voulez-vous ce nombre premier ' + str(n) + ' ? yes or no ?') return n
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