Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 399: | \[{8^{399}-1\over7}\] | 7 × 73 × 127 × 337 × 32377 × 73417 × 83791 × 92737 × 524287 × 649657 × 1212847 × 93507247 × 3042645634792541312037847<25> × 163537220852725398851434325720959<33> × 29724614739876344125010817433703775877960388838436140673<56> × 122899168808744663588141025320026245511852609957212433417<57> × 68539098502476500342849178765232476276974878815092900810113<59> × 158158499411639789916881458651390096442967992847759443731141877011837994400765121<81> |