Base 25 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
56: | \[{25^{56}-1\over24}\] | 23 × 13 × 17 × 29 × 113 × 313 × 337 × 449 × 11489 × 19531 × 234750601 × 2520917617 × 59509429687890001<17> × 37007700327977836913<20> |