Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
103: | \[{31^{103}-1\over30}\] | 619 × 7417 × 88368851 × 1278383012006645095427<22> × 228852111433810636140979007219<30> × 3269732036867196542633009968685892492461<40> × 350095877602582444216618272982250341502313669637<48> |