Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 561: | \[{5^{561}-1\over4}\] | 31 × 199 × 409 × 90271 × 317731 × 4200769 × 12207031 × 466344409 × 386478495679<12> × 654652168021<12> × 343063620501606390046364264618447587218649<42> × 1202338040280510524134632541097924516136661<43> × 1668129981554035361218550962703364039772531<43> × 41602252593301181022760943389243600477779651258661<50> × 1083765449307240209607018228295109706706942047703089360879158269<64> × 2438381544291258559925294970374272234237944145155801092226104180827074127253739002033143159<91> |