Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 281: | \[{8^{281}-1\over7}\] | 80929 × 1390916281 × 2475486361 × 48009215293052652841860443273079338843737271906291675944391068955229998769420319<80> × 626322472637042112379617556574437460372478130091490111806135154280070248067062629972139895896953692975358576879266688023648639640273675162065398163911<150> |