Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 671: | \[{7^{671}-1\over6}\] | 367 × 1123 × 4759 × 265717 × 293459 × 177237331 × 79252728549347<14> × 224966580080309<15> × 654815536676045164469501<24> × 2938782356882614371053812921177<31> × 1914662449813727660680530326064591907<37> × [107656250505459558281397762771646591902360024097615161556963324112233425023151861284413816589504009804264807677166915483332766687448834632103465683709212155660535968113472205656309209396041211677302910615051027136992710960580329893859918356701241508811618409567770106924846242894647165096906439052948794815811385301402903458319451349023546201109772731838896467685130953187725349716392148620958291187861937119645174888343<420>] |