Base 29 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
56: | \[{29^{56}-1\over28}\] | 23 × 3 × 5 × 7 × 421 × 353641 × 2865913 × 88009573 × 427822081 × 574995877 × 826031641 × 596882888281<12> × 73181145732201697<17> |