Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
96: | \[{20^{96}-1\over19}\] | 32 × 7 × 13 × 17 × 97 × 127 × 401 × 421 × 10369 × 12277 × 31177 × 160001 × 821113 × 675796129 × 1505882353 × 969759919969<12> × 6756288659793814433<19> × 41421229588195582987688749156138489729<38> |