Popes with the longest reigns

Including Peter, who was the first Bishop of Rome and the first pope, the list of the 11 longest-reigning popes^[1] includes:

1. Saint Peter (30–64 or 67): 34 or 37 years.
2. Pius IX (1846–1878):^[2] 31 years, 7 months and 23 days (11,560 days).
3. John Paul II (1978–2005): 26 years, 5 months and 17 days (9,665 days)
4. Leo XIII (1878–1903):^[3] 25 years, 5 months and 1 day (9,281 days).
5. Pius VI (1775–1799):^[4] 24 years, 6 months and 15 days (8,962 days).
6. Adrian I (772–795):^[5] 23 years, 10 months and 25 days (8,729 days).
7. Pius VII (1800–1823):^[6] 23 years, 5 months and 7 days (8,560 days).
8. Alexander III (1159–1181):^[7] 21 years, 11 months and 24 days (8,029 days).
9. St. Sylvester I (314–335):^[8] 21 years, 11 months and 1 day (8,005 days).
10. St. Leo I (440–461):^[9] 21 years, 1 month, and 13 days. (7,713 days).
11. Urban VIII (1623–1644):^[10] 20 years, 11 months and 24 days (7,664 days).

Popes with the shortest reigns

The list of the 11 shortest-reigning popes^[1] includes:

1. Urban VII (September 15–September 27, 1590):^[11] reigned for 13 calendar days,^[12] died before consecration.
2. Boniface VI (April, 896):^[13] reigned for 16 calendar days
3. Celestine IV (October 25–November 10, 1241):^[14] reigned for 17 calendar days, died before consecration.
4. Theodore II (December, 897):^[15] reigned for 20 calendar days
5. Sisinnius (January 15–February 4, 708):^[16] reigned for 21 calendar days
6. Marcellus II (April 9–May 1, 1555):^[17] reigned for 22 calendar days
7. Damasus II (July 17–August 9, 1048):^[18] reigned for 24 calendar days
8. Pius III (September 22–October 18, 1503):^[19] reigned for 27 calendar days.
9. Leo XI (April 1–April 27, 1605):^[20] reigned for 27 calendar days
10. Benedict V (May 22–June 23, 964):^[21] reigned for 33 calendar days.
11. John Paul I (August 26–September 28, 1978): reigned for 33 calendar days.^[22]