Compare 521 vs 523
| Property | 521 | 523 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 5211 | 5231 |
| Prime factorization | 521 | 523 |
| Divisors count | 2 | 2 |
| Divisors | 1, 521 | 1, 523 |
| Number of properties | 6 | 3 |
| Chen primes | 70th | |
| Left-truncatable primes | 34th | |
| Lucas primes | 8th | |
| Primes | 98th | 99th |
| Pythagorean primes | 46th | |
| Solinas primes | 39th | |
| Twin primes (1st member) | 25th | |
| Twin primes (2nd member) | 25th | |
| Roman numberals | DXXI | DXXIII |
| Base 2 | 10000010012 | 10000010112 |
| Base 3 | 2010223 | 2011013 |
| Base 4 | 200214 | 200234 |
| Base 5 | 40415 | 40435 |
| Base 6 | 22256 | 22316 |
| Base 7 | 13437 | 13457 |
| Base 8 | 10118 | 10138 |
| Base 9 | 6389 | 6419 |
| Base 10 | 52110 | 52310 |
| Base 11 | 43411 | 43611 |
| Base 12 | 37512 | 37712 |
| Base 13 | 31113 | 31313 |
| Base 14 | 29314 | 29514 |
| Base 15 | 24b15 | 24d15 |
| Base 16 | 20916 | 20b16 |