Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 645: | \[{5^{645}-1\over4}\] | 11 × 31 × 71 × 181 × 431 × 1291 × 1741 × 18471511 × 144982241 × 1269509641 × 1644512641 × 1273316896028212631<19> × 172827552198815888791<21> × 4144987978415039132191<22> × 43955934961951833386625799<26> × 51349797354047205216257689<26> × 1476723231934366547296339034741<31> × 3118954401781386053150022153343306501<37> × 562333383604492247021643282127779941952188154879091<51> × 14100541201973609621116340293054216571892383095715084191<56> × 959493362324881548300789477271647099834919897164710606487557936832236103398511610069611863919446126615123321515674361<117> |