Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 327: | \[{20^{327}-1\over19}\] | 421 × 62131 × 1407409 × 70741219 × 4786107379<10> × 30141718771<11> × 156044535379<12> × 13280377951471<14> × 93375061952427121<17> × 6204311740426481585243395094209<31> × 129604250659026736109701065421661563297127174485218222239267216986597196453680196268568077889400721838664795338799261869<120> × [246160558243948763618819610138631460738451743907702096992293957954853586933825917007593654977886747407653760065596292123456831032802792489272453636108282071599277756762440380067546893363951881<192>] |