Math - multiplicative persistence order 7 in base 10

• 5 digits:68889 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [7]
• 6 digits:238889 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [7]
• 6 digits:267799 -> 47628 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [7]
• 6 digits:347799 -> 47628 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [7]
• 6 digits:377779 -> 64827 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [7]
• 6 digits:377889 -> 84672 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [7]
• 6 digits:467789 -> 84672 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [7]
• 9 digits:888888888 -> 134217728 -> 18816 -> 384 -> 96 -> 54 -> 20 -> 0 [7]
• 10 digits:2488888888 -> 134217728 -> 18816 -> 384 -> 96 -> 54 -> 20 -> 0 [7]
• 11 digits:26777777899 -> 914838624 -> 331776 -> 2646 -> 288 -> 128 -> 16 -> 6 [7]
• 11 digits:27777888999 -> 1792336896 -> 2939328 -> 23328 -> 288 -> 128 -> 16 -> 6 [7]
• 11 digits:34777777899 -> 914838624 -> 331776 -> 2646 -> 288 -> 128 -> 16 -> 6 [7]
• 11 digits:36777788899 -> 1792336896 -> 2939328 -> 23328 -> 288 -> 128 -> 16 -> 6 [7]
• 11 digits:44777788999 -> 1792336896 -> 2939328 -> 23328 -> 288 -> 128 -> 16 -> 6 [7]
• 11 digits:47788888889 -> 3699376128 -> 2939328 -> 23328 -> 288 -> 128 -> 16 -> 6 [7]
• 11 digits:66778888888 -> 3699376128 -> 2939328 -> 23328 -> 288 -> 128 -> 16 -> 6 [7]
• 12 digits:227788888889 -> 3699376128 -> 2939328 -> 23328 -> 288 -> 128 -> 16 -> 6 [7]
• 12 digits:279999999999 -> 48814981614 -> 1769472 -> 21168 -> 96 -> 54 -> 20 -> 0 [7]
• 12 digits:367999999999 -> 48814981614 -> 1769472 -> 21168 -> 96 -> 54 -> 20 -> 0 [7]
• 13 digits:2777888889999 -> 147483721728 -> 4214784 -> 7168 -> 336 -> 54 -> 20 -> 0 [7]
• 13 digits:3677788888999 -> 147483721728 -> 4214784 -> 7168 -> 336 -> 54 -> 20 -> 0 [7]
• 13 digits:4477788889999 -> 147483721728 -> 4214784 -> 7168 -> 336 -> 54 -> 20 -> 0 [7]
• 13 digits:4777777778999 -> 134481277728 -> 4214784 -> 7168 -> 336 -> 54 -> 20 -> 0 [7]
• 13 digits:6677777777899 -> 134481277728 -> 4214784 -> 7168 -> 336 -> 54 -> 20 -> 0 [7]
• 14 digits:22777777778999 -> 134481277728 -> 4214784 -> 7168 -> 336 -> 54 -> 20 -> 0 [7]
• 17 digits:77777788888888999 -> 1438916737499136 -> 4444263936 -> 1492992 -> 11664 -> 144 -> 16 -> 6 [7]
• 18 digits:247777778888888999 -> 1438916737499136 -> 4444263936 -> 1492992 -> 11664 -> 144 -> 16 -> 6 [7]
• 18 digits:337777778888888899 -> 1438916737499136 -> 4444263936 -> 1492992 -> 11664 -> 144 -> 16 -> 6 [7]