Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
107: | \[{19^{107}-1\over18}\] | 3727029213159221227481880371758988192479699585560736992193446518019059007305528138257031138276615655165685013865802400046939654576178541<136> |