="Dernier chiffre : "&SIERREUR(STXT(A1;MAX(SI(ESTNUM(--STXT(A1;LIGNE(INDIRECT("1:"&NBCAR(A1)));1));LIGNE(INDIRECT("1:"&NBCAR(A1)))));1);"")&" - Position : "&SIERREUR(EXP(LN(MAX(SI(ESTNUM(-STXT(A1;LIGNE(INDIRECT("1:"&NBCAR(A1)));1));LIGNE(INDIRECT("1:"&NBCAR(A1)))))));"")