Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 177: | \[{8^{177}-1\over7}\] | 73 × 1063 × 179951 × 184081 × 288236359 × 27989941729<11> × 196629322303<12> × 3203431780337<13> × 15888898944343<14> × 9213624084535989031<19> × 8099559410464120708848563721343<31> × 64835086810126708428197417798336316991<38> |