Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 815: | \[{8^{815}-1\over7}\] | 31 × 151 × 150287 × 704161 × 836191 × 110211473 × 355307401 × 27669118297<11> × 4672501949191<13> × 116539854237679<15> × 36230454570129675721<20> × 619079222361672204943<21> × 2225594819830796033213523225511<31> × 911066556314339913468351173796888655666135594657<48> × 180883807440027655212532885072379634915469957001205875201<57> × 6309875796859222682628258124466792652955476368011894066158361980151<67> × 528171517455534029210127386106091229808271807534977151762112880888333401<72> × [222403596265048621165728833640363351092945152017095848475104172327658964781043833253524225002884220150463893331033573540082729354679027364040341236745324908785445156140498817105138650057428391609789852620274680200785048322269457984765629287724118377080249927026304710604467237528097450020092656061908127089746344553550381177278928659477812762932791<348>] |