Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 395: | \[{20^{395}-1\over19}\] | 11 × 61 × 251 × 2371 × 26861 × 1106101121 × 7731160503875069<16> × 4178614725165165091<19> × 52283868973702536169<20> × 282200972403903568166451593351<30> × 7012116809755762514267308698568975988864311<43> × [174446980383687017419138013483305917315405813520291318572345337280168592301207058737547150404320524607560489832536282913856288211652021618508981676874523210816675561<165>] × [61395146421101881726728044915079581280778721595104133057479244350481964852229198753506597817922741761789844228810980351257294970266550835880434399054982086840225535849012217683462690780530345929651281<200>] |