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Perfect Numbers
| Rank | Perfect Number | Digits | Discoverer | Downloads | ||
| 44 | 232582656 × (232582657-1) | 19616714 | 2006 Cooper, Boone, Woltman, Kurowski, et al. | TXT | ZIP | RAR |
| 43 | 230402456 × (230402457-1) | 18304103 | 2005 Cooper, Boone, Woltman, Kurowski, et al. | TXT | ZIP | RAR |
| 42 | 225964950 × (225964951-1) | 15632458 | 2005 Nowak, Woltman, Kurowski, et. al. | TXT | ZIP | RAR |
| 41 | 224036582 × (224036583-1) | 14471465 | 2004 Findley, Woltman, Kurowski, et. al. | TXT | ZIP | RAR |
| 40 | 220996010 × (220996011-1) | 12640858 | 2003 Shafer, Woltman, Kurowski, et. al. | TXT | ZIP | RAR |
| 39 | 213466916 × (213466917-1) | 8107892 | 2001 Cameron, Woltman, Kurowski, et. al. | TXT | ZIP | RAR |
| 38 | 26972592 × (26972593-1) | 4197919 | 1999 Hajratwala, Woltman, Kurowski, et. al. | TXT | ZIP | RAR |
| 37 | 23021376 × (23021377-1) | 1819050 | 1998 Clarkson, Woltman, Kurowski, et. al. | TXT | ZIP | RAR |
| 36 | 22976220 × (22976221-1) | 1791864 | 1997 Spence, Woltman, et. al. | TXT | ZIP | RAR |
| 35 | 21398268 × (21398269-1) | 841842 | 1996 Armengaud, Woltman, et. al. | TXT | ZIP | RAR |
| 34 | 21257786 × (21257787-1) | 757263 | 1996 Slowinski&Gage | TXT | ||
| 33 | 2859432 × (2859433-1) | 517430 | 1994 Slowinski&Gage | TXT | ||
| 32 | 2756838 × (2756839-1) | 455663 | 1992 Slowinski&Gage | TXT | ||
| 31 | 2216090 × (2216091-1) | 130100 | 1985 Slowinski | TXT | ||
| 30 | 2132048 × (2132049-1) | 79502 | 1983 Slowinski | TXT | ||
| 29 | 2110502 × (2110503-1) | 66530 | 1988 Colquitt&Welsh | TXT | ||
| 28 | 286242 × (286243-1) | 51924 | 1982 Slowinski | TXT | ||
| 27 | 244496 × (244497-1) | 26790 | 1979 Nelson&Slowinski | TXT | ||
| 26 | 223208 × (223209-1) | 13973 | 1979 Noll | TXT | ||
| 25 | 221700 × (221701-1) | 13066 | 1978 Noll&Nickel | TXT | ||
| 24 | 219936 × (219937-1) | 12003 | 1971 Tuckerman | TXT | ||
| 23 | 211212 × (211213-1) | 6751 | 1963 Gillies | TXT | ||
| 22 | 29940 × (29941-1) | 5985 | 1963 Gillies | TXT | ||
| 21 | 29688 × (29689-1) | 5834 | 1963 Gillies | TXT | ||
| 20 | 24422 × (24423-1) | 2663 | 1961 Hurwitz | TXT | ||
| 19 | 24252 × (24253-1) | 2561 | 1961 Hurwitz | TXT | ||
| 18 | 23216 × (23217-1) | 1937 | 1957 Riesel | TXT | ||
| 17 | 22280 × (22281-1) | 1373 | 1952 Robinson | TXT | ||
| 16 | 22202 × (22203-1) | 1327 | 1952 Robinson | TXT | ||
| 15 | 21278 × (21279-1) | 770 | 1952 Robinson | TXT | ||
| 14 | 2606 × (2607-1) | 366 | 1952 Robinson | TXT | ||
| 13 | 2520 × (2521-1) | 314 | 1952 Robinson | TXT | ||
| 12 | 2126 × (2127-1) | 77 | 1876 Lucas | TXT | ||
| 11 | 2106 × (2107-1) | 65 | 1914 Powers | TXT | ||
| 10 | 288 × (289-1) | 54 | 1911 Powers | TXT | ||
| 9 | 260 × (261-1) | 37 | 1883 Pervushin | TXT | ||
| 8 | 230 × (231-1) | 19 | 1772 Euler | TXT | ||
| 7 | 218 × (219-1) | 12 | 1588 Cataldi | TXT | ||
| 6 | 216 × (217-1) | 10 | 1588 Cataldi | TXT | ||
| 5 | 212 × (213-1) | 8 | 1456 ? | TXT | ||
| 4 | 26 × (27-1) | 4 | ? | TXT | ||
| 3 | 24 × (25-1) | 3 | ? | TXT | ||
| 2 | 22 × (23-1) | 2 | ? | TXT | ||
| 1 | 21 × (22-1) | 1 | ? | TXT | ||