Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
145: | \[{15^{145}-1\over14}\] | 11 × 59 × 4931 × 45829626891648603881874121<26> × 15476275967141572773889537007699<32> × 10742665205719702239035931736633456038776965336655176274378819190590029281468183326840017201756174003432441<107> |