Base 26 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
51: | \[{26^{51}-1\over25}\] | 19 × 37 × 103 × 1123 × 216649 × 1696363 × 40385656825829055229<20> × 48308750112487048414621782064291<32> |