Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
255: | \[{8^{255}-1\over7}\] | 31 × 73 × 103 × 151 × 631 × 919 × 2143 × 11119 × 16831 × 23311 × 106591 × 131071 × 949111 × 3696481 × 2109936092650831<16> × 9520972806333758431<19> × 75582488424179347083438319<26> × 5702451577639775545838643151<28> × 24710462787135943791475548268920478656481<41> × 13854772173181680651901626546855984966582610663321<50> |