perfect number (thing)

Some facts about perfect numbers:

• Even perfect numbers end in either six or eight.
• Perfect numbers are even...so far.
• There are infinitely many perfect numbers.
• If there are odd perfect numbers, they at least are bigger than 10^300.

List of known perfect numbers:

1. 6
2. 28
3. 496
4. 8,128
5. 33,550,336
6. 8,589,869,056
7. 137,438,691,328
8. 2,305,843,008,139,952,128
9. 2.658x10^36
10. 1.916x10^53
11. 1.316x10^64
12. 1.447x10^76
13. 2.356x10^313
14. 1.411x10^365
15. 5.416x10^769
16. 1.089x10^1326
17. 9.950x10^1372
18. 3.357x10^1936
19. 1.820x10^2560
20. 4.077x10^2662
21. 1.143x10^5833
22. 6.000x10^5984
23. 3.960x10^6750
24. 9.311x10^12002
25. 1.007x10^13065
26. 8.115x10^13972
27. 3.651x10^26789
28. 1.441x10^51923
29. 1.362x10^66529
30. 1.315x10^79501
31. 2.783x10^130099
32. 1.516x10^455662
33. 8.385x10^517429
34. 8.497x10^757262
35. 3.319x10^841841
36. 1.943x10^1791863
37. 8.117x10^1819049