“Then Jesus appeared
Then to the twelve.”
καὶ ὅτι ὤφθη Κηφᾷ, εἶτα τοῖς δώδεκα·
Paul said that then Jesus appeared (καὶ ὅτι ὤφθη) to Cephas (Κηφᾷ), and then to the twelve apostles (εἶτα τοῖς δώδεκα). Paul explained that Jesus Christ appeared to Peter, the rock, Cephas, as well as the twelve, now eleven since Judas did not belong with them anymore. It may actually have been ten if you exclude Peter from the other original apostles. Paul did not mention Jesus appearing to Mary Magdalen or the other women at the tomb. Definitely, the resurrected Jesus had risen from the dead in these appearances to his trusted close followers. Do you accept the resurrected Jesus?