Base 26 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 87: | \[{26^{87}-1\over25}\] | 19 × 37 × 59 × 349 × 506689 × 17830999 × 368920021 × 34521554245831<14> × 73355903553709150436991421893506428181<38> × 414699692608243377845852290488266105663359<42> |