Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
70: | \[{13^{70}-1\over12}\] | 2 × 72 × 11 × 29 × 71 × 211 × 2411 × 22079 × 30941 × 654221 × 759641 × 5229043 × 3357897971 × 16566575194331<14> × 707179356161321<15> |