Compare 851 vs 857
| Property | 851 | 857 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 231 × 371 | 8571 |
| Prime factorization | 23 × 37 | 857 |
| Divisors count | 4 | 2 |
| Divisors | 1, 23, 37, 851 | 1, 857 |
| Number of properties | 1 | 9 |
| Chen primes | 101st | |
| Cousin primes (2nd member) | 35th | |
| Long primes | 52nd | |
| Primes | 148th | |
| Prime triplets (1st member) | 28th | |
| Prime triplets (2nd member) | 27th | |
| Pythagorean primes | 72nd | |
| Semiprimes | 257th | |
| Sexy primes (1st member) | 67th | |
| Twin primes (1st member) | 34th | |
| Roman numberals | DCCCLI | DCCCLVII |
| Base 2 | 11010100112 | 11010110012 |
| Base 3 | 10111123 | 10112023 |
| Base 4 | 311034 | 311214 |
| Base 5 | 114015 | 114125 |
| Base 6 | 35356 | 35456 |
| Base 7 | 23247 | 23337 |
| Base 8 | 15238 | 15318 |
| Base 9 | 11459 | 11529 |
| Base 10 | 85110 | 85710 |
| Base 11 | 70411 | 70a11 |
| Base 12 | 5ab12 | 5b512 |
| Base 13 | 50613 | 50c13 |
| Base 14 | 44b14 | 45314 |
| Base 15 | 3bb15 | 3c215 |
| Base 16 | 35316 | 35916 |