Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 639: | \[{8^{639}-1\over7}\] | 73 × 1279 × 66457 × 228479 × 262657 × 48544121 × 212885833 × 2849881972114740679<19> × 4205268574191396793<19> × 69466156512528108241<20> × 84462210560148142953097<23> × 1329628131546931497103420134367<31> × 28435302301212461494420074814087<32> × 581211581673454706767349073071710126567<39> × 285214899101406936478900500107217450004008375063001716198692998263807283682139993849993850457311251996998833456962309198603948663860459983449530947717448983472561690915467504560022277601575542666921190988769133361974563410347288358727253725798301858115912269943808710369452988969063813620018478534058432890656671180640817472487671456164953455244048908305116209<360> |