Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 305: | \[{5^{305}-1\over4}\] | 11 × 71 × 1831 × 2441 × 8419 × 1884901 × 918585913061<12> × 1786560207910631<16> × 117369445599178322177831741<27> × 140194179307171898833699259<27> × 282652835579996912219434560073594541<36> × 907108630550049150277513478107544348139630852447868173192872357776247941286941<78> |