Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 306: | \[{8^{306}-1\over7}\] | 34 × 19 × 73 × 103 × 307 × 919 × 2143 × 2857 × 3673 × 6529 × 11119 × 43691 × 87211 × 98227 × 123931 × 131071 × 262657 × 26159806891<11> × 27439122228481<14> × 33204917536003441<17> × 407770693450231393<18> × 572404735191016891<18> × 24418671951944649151<20> × 75582488424179347083438319<26> × 72665575884323021522460727660186327381229881<44> × 49848448234572624009465371493197779785120970152607<50> |