Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
145: | \[{18^{145}-1\over17}\] | 41 × 2711 × 52201 × 1505548068007783<16> × 98800490511312118297<20> × 4542493092455856362519026681<28> × 1551401186925508484133392510398878345592061650403823690709863421889901131274144625280384307820122819174127471<109> |