Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 385: | \[{20^{385}-1\over19}\] | 112 × 29 × 61 × 71 × 251 × 491 × 701 × 911 × 2311 × 23311 × 32719 × 164011 × 2209901 × 1618656271 × 9356642542171<13> × 10778947368421<14> × 13295107990361<14> × 2571413672161047121<19> × 11591111347512862858060061<26> × 167103718909962607171187251<27> × 14758174941778587505370292571<29> × 479318732995281644893445223208006167088354661<45> × 94492701984716091424823399007224633473246602866536721<53> × 114891277679482165685568735498224423955001319611462380278900415721843955234921049149946851<90> × 65381741512889086235554841558960650020389358206099374240170550328927396288741269546523067307948937829802369890040038364882891<125> |