Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 325: | \[{20^{325}-1\over19}\] | 11 × 61 × 131 × 151 × 251 × 521 × 1301 × 1451 × 1951 × 3121 × 3511 × 4421 × 90481 × 142559 × 1369801 × 7466201 × 9690539 × 46794901 × 4470064171<10> × 18778723564901<14> × 144142570154831<15> × 4329520082233745656921<22> × 11940624404659954968901<23> × 27941026838145425576388574976590597554551<41> × 164308224556794169210696540925716763749501<42> × 9564868658900677820820770660246568102499875301<46> × 70695289111063788889257151704553608241296110578366759310905892222681920343977242696925352551165901597405650370164213068860522595276682305441101<143> |