Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
123: | \[{13^{123}-1\over12}\] | 3 × 61 × 1340947 × 6740847065723<13> × 1374332707191583<16> × 763604898951326591407<21> × 34241383511160276465403<23> × 2500231913819762291766481<25> × 58047259977349384372529747126587<32> |