Il semblerait que les nombres de la forme $2^4+8n+1$ seraient tous divisibles par 17 Après calcul Tous nombres de la forme $X^4+8n+1$ est divisible par $X^4+1$ J’irai même plus loin Soit N un nombre donné Tous nombres de la forme $X^N+2Nn+1$ est divisible par $X^N+1$ n peut décrire l’ensemble des entiers naturels
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