Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 391: | \[{7^{391}-1\over6}\] | 47 × 3083 × 14009 × 2357731 × 2767631689 × 31479823396757<14> × 721203469358049113389755819257183928662405067449<48> × 478566296656273815311438559010751123205277732759848440243<57> × 3141008593115068042382493551855465658245019902656812354218714551847924316215625177594043159893519789252174594298766442356723354117384178929592688927812737306785331274911121975721266393553<187> |