Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
63: | \[{31^{63}-1\over30}\] | 32 × 43 × 127 × 331 × 3637 × 6301 × 70309 × 81343 × 917087137 × 75077698123<11> × 2813432694367<13> × 728921581954037396189325850537700569<36> |