Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 672: | \[{20^{672}-1\over19}\] | 32 × 72 × 13 × 17 × 29 × 43 × 71 × 97 × 113 × 127 × 197 × 337 × 401 × 421 × 449 × 617 × 673 × 827 × 1009 × 2689 × 10369 × 10529 × 12277 × 14561 × 28393 × 31177 × 32719 × 160001 × 278881 × 460951 × 821113 × 1464961 × 2750161 × 8651161 × 36363727 × 298794049 × 675796129 × 1424354653 × 1505882353 × 5417928377<10> × 8442733531<10> × 52725570913<11> × 175184754697<12> × 969759919969<12> × 29132639699521<14> × 1953440172349793<16> × 7556151962616769<16> × 1327100500372993081<19> × 6756288659793814433<19> × 23865909903031438853857<23> × 3271636763438119382452373546369<31> × 41421229588195582987688749156138489729<38> × 68744144086548693348671968153244814234241<41> × 15633932947763102282423668227355132626824929<44> × 5547726051986930321514269600677675518536780955909887742673<58> × 281476735929260372880093767270416777215999344635904000000160001<63> × 180463995031757870340591522016634967788704944978548643906140692273<66> × 2258146804017507499131816520567320967861348237050694479114375794307192231642691053840103994391628231633406818626908897017349527574935075980294465055777978129378663038715256840772639136174519937574585759308980637785024321<220> |