Compare 521 vs 857
| Property | 521 | 857 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 5211 | 8571 |
| Prime factorization | 521 | 857 |
| Divisors count | 2 | 2 |
| Divisors | 1, 521 | 1, 857 |
| Number of properties | 6 | 9 |
| Chen primes | 70th | 101st |
| Cousin primes (2nd member) | 35th | |
| Long primes | 52nd | |
| Lucas primes | 8th | |
| Primes | 98th | 148th |
| Prime triplets (1st member) | 28th | |
| Prime triplets (2nd member) | 27th | |
| Pythagorean primes | 46th | 72nd |
| Sexy primes (1st member) | 67th | |
| Solinas primes | 39th | |
| Twin primes (1st member) | 25th | 34th |
| Roman numberals | DXXI | DCCCLVII |
| Base 2 | 10000010012 | 11010110012 |
| Base 3 | 2010223 | 10112023 |
| Base 4 | 200214 | 311214 |
| Base 5 | 40415 | 114125 |
| Base 6 | 22256 | 35456 |
| Base 7 | 13437 | 23337 |
| Base 8 | 10118 | 15318 |
| Base 9 | 6389 | 11529 |
| Base 10 | 52110 | 85710 |
| Base 11 | 43411 | 70a11 |
| Base 12 | 37512 | 5b512 |
| Base 13 | 31113 | 50c13 |
| Base 14 | 29314 | 45314 |
| Base 15 | 24b15 | 3c215 |
| Base 16 | 20916 | 35916 |