Compare 1951 vs 1957
| Property | 1951 | 1957 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 19511 | 191 × 1031 |
| Prime factorization | 1951 | 19 × 103 |
| Divisors count | 2 | 4 |
| Divisors | 1, 1951 | 1, 19, 103, 1957 |
| Number of properties | 3 | 1 |
| Cuban primes 1 | 14th | |
| Primes | 297th | |
| Semiprimes | 564th | |
| Twin primes (2nd member) | 60th | |
| Roman numberals | MCMLI | MCMLVII |
| Base 2 | 111100111112 | 111101001012 |
| Base 3 | 22000213 | 22001113 |
| Base 4 | 1321334 | 1322114 |
| Base 5 | 303015 | 303125 |
| Base 6 | 130116 | 130216 |
| Base 7 | 54557 | 54647 |
| Base 8 | 36378 | 36458 |
| Base 9 | 26079 | 26149 |
| Base 10 | 195110 | 195710 |
| Base 11 | 151411 | 151a11 |
| Base 12 | 116712 | 117112 |
| Base 13 | b7113 | b7713 |
| Base 14 | 9d514 | 9db14 |
| Base 15 | 8a115 | 8a715 |
| Base 16 | 79f16 | 7a516 |