Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 187: | \[{5^{187}-1\over4}\] | 409 × 4200769 × 12207031 × 466344409 × 1202338040280510524134632541097924516136661<43> × 1083765449307240209607018228295109706706942047703089360879158269<64> |