Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 475: | \[{5^{475}-1\over4}\] | 11 × 71 × 101 × 191 × 251 × 401 × 2851 × 6271 × 1954151 × 3981071 × 4113691 × 9384251 × 1245576402371959291<19> × 11600321878916922053491<23> × 11360856146437080511603913201<29> × 11971699680363533589698621027808346660430201<44> × 4608870245707777930782391371723915459255110927237679601<55> × 347490622692625148334686200496162077889916580996992482833633014083203033237999934148869452023801162727212010339824740351<120> |