Compare 503 vs 521
| Property | 503 | 521 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 5031 | 5211 |
| Prime factorization | 503 | 521 |
| Divisors count | 2 | 2 |
| Divisors | 1, 503 | 1, 521 |
| Number of properties | 9 | 6 |
| Chen primes | 68th | 70th |
| Cousin primes (2nd member) | 27th | |
| Harmonic primes | 40th | |
| Isolated primes | 49th | |
| Long primes | 36th | |
| Lucas primes | 8th | |
| Primes | 96th | 98th |
| Pythagorean primes | 46th | |
| Safe primes | 18th | |
| Sexy primes (1st member) | 47th | |
| Solinas primes | 37th | 39th |
| Twin primes (1st member) | 25th | |
| Roman numberals | DIII | DXXI |
| Base 2 | 1111101112 | 10000010012 |
| Base 3 | 2001223 | 2010223 |
| Base 4 | 133134 | 200214 |
| Base 5 | 40035 | 40415 |
| Base 6 | 21556 | 22256 |
| Base 7 | 13167 | 13437 |
| Base 8 | 7678 | 10118 |
| Base 9 | 6189 | 6389 |
| Base 10 | 50310 | 52110 |
| Base 11 | 41811 | 43411 |
| Base 12 | 35b12 | 37512 |
| Base 13 | 2c913 | 31113 |
| Base 14 | 27d14 | 29314 |
| Base 15 | 23815 | 24b15 |
| Base 16 | 1f716 | 20916 |