Base 30 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
51: | \[{30^{51}-1\over29}\] | 72 × 19 × 103 × 409 × 10570676926829627653<20> × 179131919437879366272824933312584640171858216971<48> |