Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 151: | \[{8^{151}-1\over7}\] | 18121 × 55871 × 165799 × 2332951 × 790468905817<12> × 7289088383388253664437433<25> × 1472569697984933610350093844623116623743774608299938377008397129155903438335887<79> |