Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 276: | \[{20^{276}-1\over19}\] | 32 × 7 × 13 × 47 × 127 × 139 × 277 × 401 × 421 × 461 × 691 × 967 × 1381 × 12277 × 563041 × 197317369 × 6373576093<10> × 103759810117<12> × 119553964489<12> × 10725299405489<14> × 113317059163579<15> × 3274400525856244223<19> × 46266279097921483078651<23> × 887612944642122132741202450909<30> × 1492150591772283530192019071401<31> × 25671002444875098778617582252548213<35> × 9679725346609474446515209660088368664307937627<46> × 72343980383608124768748639028265426206797967293356249195386560201439489<71> |