Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 551: | \[{8^{551}-1\over7}\] | 233 × 1103 × 2089 × 4177 × 4409 × 14327 × 27551 × 32377 × 524287 × 1212847 × 3818431 × 9857737155463<13> × 73313493626112567818179561<26> × 15047207907283785223567857264566942009057638990573141456392568106577256738933540911210280244101118007417805328040232877487303293567630046047<140> × [17147625342898424476493784434968883345940456512137554284408890557782000606877837698555334048945216373837382220035561647980517354137724414807990210260103847424167006837597792574249086019179186526577706773307164104433840518430241678968461329610305658547409250467050741285201<272>] |