Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 271: | \[{8^{271}-1\over7}\] | 24391 × 2248759 × 36936217 × 15242475217<11> × 152948738791<12> × 49322756803485314471713<23> × 248927757868131890277330541567820045256364273970773286542188386932989391<72> × 134567887054668214515161203566320679757253483787282009808886842167567907197836768970162992655659228685857074681<111> |