Base 25 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
39: | \[{25^{39}-1\over24}\] | 3 × 7 × 31 × 79 × 3121 × 5227 × 38923 × 305175781 × 22735632934561<14> × 608459012088799<15> |