Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
127: | \[{7^{127}-1\over6}\] | 260461507 × 554351226505275380676162672703<30> × 245341643198368582843352144598480744468850041775022125500767047213117<69> |