Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 495: | \[{8^{495}-1\over7}\] | 23 × 31 × 73 × 89 × 151 × 199 × 271 × 631 × 881 × 991 × 3191 × 23311 × 153649 × 201961 × 262657 × 348031 × 599479 × 8950393 × 19694071 × 33057806959<11> × 49971617830801<14> × 2048568835297380486760231<25> × 106638643913461155414345241<27> × 334202934764737951438594746151<30> × 6084777159537635796550536863741698483921<40> × 170886618823141738081830950807292771648313599433<48> × 3307778274605860019775884877775856144362368451681<49> × 3745535208623794897677784427764312686722433921155541307576231<61> × 212395616035232811933352364361301219186438935816438763801362777040744684201<75> |