The following pictures show n unit circles packed inside the smallest known regular pentagon (of side length s).

1. | 2. | 3. | |||||

s = 2tan(36°) s = 1.453+ Trivial. | s = 2tan(36°) + √5 - 1 s = 2.689+ Trivial. | s = 3.015+ Found by George Sicherman in July 2012. |

4. | 5. | 6. | |||||

s = 3.314+ Found by George Sicherman in July 2012. | s = 2tan(36°) + 2 s = 3.453+ Trivial. | s = 2tan(36°) + 4sin(36°) s = 3.804+ Trivial. |

7. | 8. | 9. | |||||

s = 4.236+ Found by George Sicherman in July 2012. | s = 4.564+ Found by George Sicherman in July 2012. | s = 4.825+ Found by George Sicherman in July 2012. |

10. | 11. | 12. | |||||

s = 5.095+ Found by George Sicherman in July 2012. | s = 5.240+ Found by David W. Cantrell in July 2012. | s = 5.407+ Found by George Sicherman in July 2012. |

13. | 14. | 15. | |||||

s = 5.651+ Found by George Sicherman in July 2012. | s = 5.808+ Found by George Sicherman in July 2012. | s = 5.945+ Found by George Sicherman in July 2012. |

16. | 17. | 18. | |||||

s = 6.129+ Found by George Sicherman in July 2012. | s = 6.419+ Found by David W. Cantrell in July 2012. | s = 6.586+ Found by David W. Cantrell in July 2012. |

19. | 20. | 21. | |||||

s = 6.777+ Found by David W. Cantrell in July 2012. | s = 6.944+ Found by David W. Cantrell in July 2012. | s = 7.107+ Found by David W. Cantrell in July 2012. |

22. | 23. | 24. | |||||

s = 7.271+ Found by David W. Cantrell in July 2012. | s = 7.397+ Found by David W. Cantrell in July 2012. | s = 7.534+ Found by David W. Cantrell in July 2012. |