From the ground state the Nubase data shows it going 82.7% to EE96Cm242 and 17.3% to EE94Pu242. However, its condition of stability is such that 9% of it will fission with an extra low energy excitation and 100% will fission with high excitation. However it is less stable than OO95Am241, with only 51 extra neutrons and a formula of A=3Z-44. So the last neutron made it less stable. And I don't see how the electron configuration had anything to do with this.