Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 390: | \[{8^{390}-1\over7}\] | 33 × 11 × 19 × 31 × 73 × 79 × 131 × 151 × 331 × 631 × 937 × 1171 × 2731 × 6553 × 8191 × 23311 × 65521 × 86113 × 107251 × 121369 × 409891 × 7623851 × 18837001 × 22366891 × 2400314671 × 7830118297<10> × 26959262851<11> × 145295143558111<15> × 339175003117573351<18> × 255375215316698521591<21> × 5302306226370307681801<22> × 571403921126076957182161<24> × 43725552532343303477113703251<29> × 134304196845099262572814573351<30> × 2728334536034592865339299805712535332071<40> × 4897406518564079146139572699835240681611<40> |