Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 315: | \[{20^{315}-1\over19}\] | 11 × 29 × 31 × 61 × 71 × 211 × 251 × 421 × 491 × 631 × 701 × 911 × 1051 × 3001 × 6301 × 6679 × 23311 × 32719 × 53101 × 82531 × 164011 × 242551 × 261451 × 460951 × 747811 × 64008001 × 66804571 × 4159879921 × 8442733531<10> × 79083953101<11> × 143677768081<12> × 13295107990361<14> × 3994611390415801<16> × 338649469410070561<18> × 1049775211713211189291<22> × 195788318726539864602271<24> × 8119934685531950847364467271<28> × 27455958930629469508499288821<29> × 20613778771413055964423150179108981<35> × 39196075874227181699083597662234630373081<41> × 10287600958458182504983419994609358363826919<44> |