Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 249: | \[{5^{249}-1\over4}\] | 31 × 499 × 12451 × 169321 × 20515111 × 64613577662440706821<20> × 486307761332920261532701<24> × 1431185706701868962383741<25> × 88040095945103834627376781<26> × 104329813967341854028495594566831365599906075380454045137769<60> |