Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 245: | \[{8^{245}-1\over7}\] | 72 × 31 × 71 × 127 × 151 × 337 × 1471 × 29191 × 41161 × 106681 × 122921 × 152041 × 4163041 × 20147473081<11> × 2340389488711<13> × 4432676798593<13> × 27653710336343911<17> × 2741672362528725535068727<25> × 252359902034571016856214298851708529738525821631<48> × 631430922992211190033830999202698905758039480236241<51> |