Next prime | 317 |

Previous prime | 311 |

Octal | (471)_{8} |

Hexadecimal | (139)_{16} |

Prime gap | 4 |

19th Cousin prime (the small number) | The big number is 317 . |

30th Prime of the Form 3n+1 | 11^{2} + 3 * 8^{2} |

30th Prime of the Form 4n+1 | 12^{2} + 13^{2} |

17th Euler prime number | |

23rd Left-truncatable prime | |

18th Right-truncatable prime | |

9th Two-sided prime |