Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 665: | \[{8^{665}-1\over7}\] | 7 × 31 × 71 × 127 × 151 × 191 × 337 × 29191 × 32377 × 73417 × 83791 × 106681 × 122921 × 152041 × 524287 × 1212847 × 420778751 × 30327152671<11> × 161517058694951<15> × 1491477035689218775711<22> × 25349242986637720573561<23> × 2336492780183039458379392561<28> × 497089570188179441708333820751<30> × 163537220852725398851434325720959<33> × 29724614739876344125010817433703775877960388838436140673<56> × 132000131451539267726138633753205343827589683243629650599609859372129401308611030157603578434763278074238873853103561<117> × [62959462435792264945025464044071668610982748532393794144774896072774994774426862785388145886577368758464865833115708058870662522774534591081083339513801940645762096569427781037175714226651360209922308361<203>] |