Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 216: | \[{8^{216}-1\over7}\] | 35 × 5 × 13 × 17 × 19 × 37 × 73 × 109 × 163 × 241 × 433 × 1297 × 2593 × 3889 × 38737 × 71119 × 87211 × 135433 × 246241 × 262657 × 279073 × 3618757 × 30433969 × 33975937 × 97685839 × 106979941 × 168410989 × 272010961 × 1164777409 × 4977454861<10> × 3718266498433<13> × 134921168163073<15> × 138991501037953<15> × 1174029487714513<16> |