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263 is the natural number between 262 and 264. It is also a prime number.
| Template:Numbers 0-1000 | |
| Ordinal | Two hundred [and] sixty-three |
| Cardinal | 263rd |
| Factorization | prime number |
263 is an irregular prime, an Eisenstein prime, a long prime, a Chen prime, a Gaussian prime, a happy prime, a sexy prime, a safe prime, and a Higgs prime.
