Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
55: | \[{17^{55}-1\over16}\] | 88741 × 15357101 × 3332897591 × 2141993519227<13> × 962619789378941<15> × 315531140147973311<18> |