Compare 501 vs 503
| Property | 501 | 503 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 1671 | 5031 |
| Prime factorization | 3 × 167 | 503 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 167, 501 | 1, 503 |
| Number of properties | 1 | 9 |
| Chen primes | 68th | |
| Cousin primes (2nd member) | 27th | |
| Harmonic primes | 40th | |
| Isolated primes | 49th | |
| Long primes | 36th | |
| Primes | 96th | |
| Safe primes | 18th | |
| Semiprimes | 154th | |
| Sexy primes (1st member) | 47th | |
| Solinas primes | 37th | |
| Roman numberals | DI | DIII |
| Base 2 | 1111101012 | 1111101112 |
| Base 3 | 2001203 | 2001223 |
| Base 4 | 133114 | 133134 |
| Base 5 | 40015 | 40035 |
| Base 6 | 21536 | 21556 |
| Base 7 | 13147 | 13167 |
| Base 8 | 7658 | 7678 |
| Base 9 | 6169 | 6189 |
| Base 10 | 50110 | 50310 |
| Base 11 | 41611 | 41811 |
| Base 12 | 35912 | 35b12 |
| Base 13 | 2c713 | 2c913 |
| Base 14 | 27b14 | 27d14 |
| Base 15 | 23615 | 23815 |
| Base 16 | 1f516 | 1f716 |