Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 985: | \[{4^{985}-1\over3}\] | 11 × 31 × 7487 × 70921 × 1512961 × 7263391 × 197002597249<12> × 42136857550241<14> × 259101467678452891<18> × 1212008606838635171<19> × 1348959352853811313<19> × 73518775918537446144887630711<29> × 251951573867253012259144010843<30> × 5004132468697940487346607403971<31> × 26828803997912886929710867041891989490486893845712448833<56> × 97986021556246722936038962043373484819973369725772350910249974593881<68> × 14151361426440829496267420051074059154905622399069862409615316025608259786666748226413155552399422240232050761367102551080171431<128> × 1477235194922507294595076918315910105001104724412786212121852508980587148671909641792651629666408834985123755341427129290103655942385192529062001068881<151> |