Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
127: | \[{20^{127}-1\over19}\] | 509 × 312576217052731918639<21> × 9024329685219466934919221249<28> × 62368770429251821715505778874398353534071110029758004648111605459751162054686199377653947028251626418709594155079<113> |