| |

Next prime | 7 |

Previous prime | 3 |

Octal | (5)_{8} |

Hexadecimal | (5)_{16} |

Prime gap | 2 |

2nd Twin prime (the small number) | The big number is 7 . |

1st Prime triplet (the smallest number) | The others are 7 and 11 . |

1st Prime quadruplet (the smallest number) | The others are 7 , 11 and 13 . |

1st Sexy prime (the small number) | The big number is 11 . |

1st Prime of the Form 4n+1 | 1^{2} + 2^{2} |

2nd Fermat prime | 2^{21} + 1 |

2nd primorial prime | 3*2 - 1 |

3rd Factorial prime | 3! - 1 |

3rd Sophie Germain prime | |

1st Safe prime | |

3rd Left-truncatable prime | |

3rd Right-truncatable prime | |

3rd Two-sided prime | |