Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 195: | \[{8^{195}-1\over7}\] | 31 × 73 × 79 × 151 × 631 × 937 × 6553 × 8191 × 23311 × 86113 × 121369 × 2400314671 × 7830118297<10> × 145295143558111<15> × 339175003117573351<18> × 255375215316698521591<21> × 134304196845099262572814573351<30> × 2728334536034592865339299805712535332071<40> |