Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 625: | \[{20^{625}-1\over19}\] | 11 × 61 × 151 × 251 × 1451 × 4751 × 57751 × 270001 × 1369801 × 7466201 × 46794901 × 96749251 × 116042501 × 9958735751<10> × 279777490001<12> × 165677657489530001<18> × 10097787909487503899501<23> × 4080607191041244045302251<25> × 11668821486402962947588751<26> × 216782682017260961889408001<27> × 5368186389476275166937063030251<31> × 9774698537375800685423615650001<31> × 16152588187914726619268411975552501<35> × [302479939264144623079881965748109146787593170832514353458281179294121916387962399317223122339735561123050256985413633703831285484641833662605337936548284421161280593484823342400724028583659243850276450491087041113751<216>] × [404454431182101374491022864086996315793692156229291886081762083979391046665009453247817800304373963831199605950319937955972932546496671352306091929652313038150175694621693436770380969207744084242702610106710910060609329596556029474339567766624775421001913847012987537608571485162518475890664209410200001<303>] |