Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 177: | \[{13^{177}-1\over12}\] | 3 × 61 × 1063 × 273997 × 5311771 × 274985077 × 210439555242381217<18> × 39514351240970968031506068648339967<35> × 30233706222041559662776806806113588758534692993333729<53> × 626815692686238733156315623831884855619830399606913131616613196461<66> |