This is the only reduced aliquot cycle with length greater than 2 that I know of. Mitchell Dickerman e-mailed it to me on Sep. 10, 1997. David Moews [email protected] 11-IX-1997 1 1215571544 2E3.11.13813313 1270824975 3E2.5E2.7.19.42467 1467511664 2E4.19.599.8059 1530808335 3E3.5.7.1619903 1579407344 2E4.31E2.59.1741 1638031815 3E4.5.7.521.1109 1727239544 2E3.2671.80833 1512587175 3.5E2.11.1833439