Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
100: | \[{7^{100}-1\over6}\] | 24 × 54 × 11 × 101 × 191 × 281 × 2551 × 2801 × 4021 × 13001 × 25301 × 31280679788951<14> × 79787519018560501<17> × 38327966300231909291101<23> |