  The nova M31N 2023-11f (2023yoa) has been recently identified as the second
eruption of a previously recognized nova, M31N 2013-10c, establishing the
latter object as the 21st recurrent nova system thus far identified in M31.
Here we present well sampled $R$-band lightcurves of both the 2013 and 2023
eruptions of this system. The photometric evolution of each eruption was quite
similar as expected for the same progenitor system. The 2013 and 2023 eruptions
each reached peak magnitudes just brighter than $R\sim16$, with fits to the
declining branches of the eruptions yielding times to decline by two magnitudes
of $t_2(R)=5.5\pm1.7$ and $t_2(R)=3.4\pm1.5$ days, respectively. M31N 2013-10c
has an absolute magnitude at peak, $M_R=-8.8\pm0.2$, making it the most
luminous known recurrent nova in M31.
