Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 640: | \[{7^{640}-1\over6}\] | 29 × 53 × 11 × 17 × 41 × 191 × 281 × 353 × 641 × 881 × 1201 × 2801 × 4021 × 35969 × 169553 × 542081 × 7699649 × 38470561 × 51016321 × 134818753 × 280372481 × 47072139617<11> × 163344191041<12> × 531968664833<12> × 810221830361<12> × 1110623386241<13> × 102118777045028801<18> × 2312581841562813841<19> × 310484866091676781304919233441<30> × 4821999754197347683089799168482241<34> × 15266848196793556098085000332888634369<38> × 2946864819021191300398084519541410172841920450078514280094081<61> × 2012386525154439162516134173158312765782049743858497994307802458783963909258968948610325640321<94> × 76902829945433945749714743425367691074573593972093444306866835811065285139783450924641994715601966010900481<107> |