Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 448: | \[{5^{448}-1\over4}\] | 26 × 3 × 13 × 17 × 29 × 113 × 313 × 337 × 449 × 641 × 2593 × 3137 × 11489 × 19531 × 271489 × 1149569 × 10922689 × 29423041 × 75068993 × 234750601 × 2520917617 × 181398083777<12> × 241931001601<12> × 59509429687890001<17> × 465314420407473281<18> × 37007700327977836913<20> × 7957141013471106527440814723329<31> × 35822800438975049964261933857034881<35> × 2593161252309265102249142836830904141299137<43> × 3013731527783874841519029441798704972855617<43> |