Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 210: | \[{20^{210}-1\over19}\] | 32 × 72 × 11 × 29 × 31 × 43 × 61 × 71 × 127 × 211 × 251 × 421 × 491 × 701 × 827 × 911 × 1051 × 3001 × 10529 × 17921 × 23311 × 32719 × 152381 × 164011 × 261451 × 460951 × 2750161 × 3551941 × 7003781 × 31585261 × 36363727 × 8442733531<10> × 26876632021<11> × 143677768081<12> × 4443547135861<13> × 13295107990361<14> × 6921878367584041<16> × 338649469410070561<18> × 27455958930629469508499288821<29> × 10904737244627142315491733742816127002801<41> |