Compare 503 vs 505
| Property | 503 | 505 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 5031 | 51 × 1011 |
| Prime factorization | 503 | 5 × 101 |
| Divisors count | 2 | 4 |
| Divisors | 1, 503 | 1, 5, 101, 505 |
| Number of properties | 9 | 1 |
| Chen primes | 68th | |
| Cousin primes (2nd member) | 27th | |
| Harmonic primes | 40th | |
| Isolated primes | 49th | |
| Long primes | 36th | |
| Primes | 96th | |
| Safe primes | 18th | |
| Semiprimes | 156th | |
| Sexy primes (1st member) | 47th | |
| Solinas primes | 37th | |
| Roman numberals | DIII | DV |
| Base 2 | 1111101112 | 1111110012 |
| Base 3 | 2001223 | 2002013 |
| Base 4 | 133134 | 133214 |
| Base 5 | 40035 | 40105 |
| Base 6 | 21556 | 22016 |
| Base 7 | 13167 | 13217 |
| Base 8 | 7678 | 7718 |
| Base 9 | 6189 | 6219 |
| Base 10 | 50310 | 50510 |
| Base 11 | 41811 | 41a11 |
| Base 12 | 35b12 | 36112 |
| Base 13 | 2c913 | 2cb13 |
| Base 14 | 27d14 | 28114 |
| Base 15 | 23815 | 23a15 |
| Base 16 | 1f716 | 1f916 |