Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
173: | \[{7^{173}-1\over6}\] | 9491935586594867440367391646466925926211879363793<49> × 2795470346154518601095703317279482175240316831812233463788382148771684556965122038863701628739457<97> |