# Compare 251 vs 307

Property | 251 | 307 |
---|---|---|

Type | prime | prime |

Unique factors | 1 | 1 |

Total factors | 1 | 1 |

Prime factorization | 251^{1} | 307^{1} |

Prime factorization | 251 | 307 |

Divisors count | 2 | 2 |

Divisors | 1, 251 | 1, 307 |

Number of properties | 10 | 9 |

Chen primes | 41st | 47th |

Cousin primes (1st member) | 18th | |

Good primes | 19th | 22nd |

Harmonic primes | 20th | 25th |

Isolated primes | 21st | 26th |

Lucky primes | 18th | |

Primes | 54th | 63rd |

Prime triplets (1st member) | 18th | |

Sexy primes (1st member) | 30th | 35th |

Sexy prime quadrupletss (1st member) | 5th | |

Sexy prime triplets (1st member) | 15th | |

Solinas primes | 30th | |

Sophie germain primes | 18th | |

Roman numberals | CCLI | CCCVII |

Base 2 | 11111011_{2} | 100110011_{2} |

Base 3 | 100022_{3} | 102101_{3} |

Base 4 | 3323_{4} | 10303_{4} |

Base 5 | 2001_{5} | 2212_{5} |

Base 6 | 1055_{6} | 1231_{6} |

Base 7 | 506_{7} | 616_{7} |

Base 8 | 373_{8} | 463_{8} |

Base 9 | 308_{9} | 371_{9} |

Base 10 | 251_{10} | 307_{10} |

Base 11 | 209_{11} | 25a_{11} |

Base 12 | 18b_{12} | 217_{12} |

Base 13 | 164_{13} | 1a8_{13} |

Base 14 | 13d_{14} | 17d_{14} |

Base 15 | 11b_{15} | 157_{15} |

Base 16 | fb_{16} | 133_{16} |