[2] The two main factions were those of d'Estouteville and Orsini, the latter of whom secured a major pre-conclave victory in managing to persuade the rest of the College to exclude the cardinals created by Paul II in pectore, in explicit defiance of the last will and testament of the previous pontiff.

Paul II had created at least eight cardinals in secret, at least five of whom were alive at the time of the conclave: Pedro Ferriz, Pietro Foscari, Giovanni Battista Savelli, Ferry de Clugny, and Jan Vitez.

[1] As in the immediately previous conclaves, Bessarion emerged as an early favorite, with six votes on the second day, those of: d'Estouteville, Calandrini, Capranica, Ammanati-Piccolomini, Caraffa, and Barbo; d'Estouteville trailed with the votes of Bessarion, Gonzaga, and Monferrato as did Forteguerri with the votes of Orsini, Eruli, and Agnifilo; Orsini got nods from della Rovere and Michiel; Roverella from Borgia and Zeno; Eruli from Forteguerri; and Calandrini from Roverella.

[1] The cardinals voting for della Rovere in the scrutiny were: Monferrato, Zeno, Michiel, Agnifilo, Roverella, Forteguerri, Bessarion, Calandrini, and Orsini.

[1] Contrary to the perennial tradition, the five remaining cardinals did not change their votes to della Rovere in the accessus to make the election "unanimous".