Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 505: | \[{5^{505}-1\over4}\] | 11 × 71 × 5051 × 205031 × 520151 × 671651 × 119524411 × 5937018283241<13> × 9476228324821<13> × 656821011757186571<18> × 3434487311396589821473854121<28> × 483593153887747265029536907421<30> × 22556231631518418786932381290161151<35> × 36690330713871434099552140344241171<35> × 252814988824873840834110547678775230375195641763234899819163219794715387801<75> × 55030132597170304262432907084494465759478023479011154795353379571505123929921<77> |