Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 320: | \[{7^{320}-1\over6}\] | 28 × 53 × 11 × 17 × 41 × 191 × 281 × 353 × 641 × 881 × 1201 × 2801 × 4021 × 169553 × 542081 × 7699649 × 38470561 × 134818753 × 47072139617<11> × 163344191041<12> × 531968664833<12> × 810221830361<12> × 102118777045028801<18> × 2312581841562813841<19> × 310484866091676781304919233441<30> × 4821999754197347683089799168482241<34> × 2946864819021191300398084519541410172841920450078514280094081<61> |