Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 363: | \[{20^{363}-1\over19}\] | 421 × 661 × 859 × 257277256721<12> × 2431995161971<13> × 10778947368421<14> × 380025140666029<15> × 175462044485240500219<21> × 2934218191523614766904837806521<31> × 207460499909279296762540583487933439637201905299100245238682598870759408878141960495778332780218147735503696620877792011<120> × 15111038509191729633185659817260464367337252414047989002169822646065841401264968129171752184618971076116944780015593923301687388936436210490205753608258112874361259465846265718000293527354833022165430919877909150610008376223503079491096771789<242> |