Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 177: | \[{31^{177}-1\over30}\] | 3 × 331 × 6373 × 1816729 × 8177401 × 499215049 × 468099896569<12> × 5587992961609<13> × 125693727758648407613<21> × 2593612406801473161066888689957754830054017617439929433838873336053<67> × 779110751002944931593880043551085194284419728286833281326930138887871379729715331740337603229935558050987115088080529709237<123> |