Math - multiplicative persistence order 11 in base 10

• 15 digits:277777788888899 -> 4996238671872 -> 438939648 -> 4478976 -> 338688 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [11]
• 15 digits:367777778888889 -> 4996238671872 -> 438939648 -> 4478976 -> 338688 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [11]
• 15 digits:447777778888899 -> 4996238671872 -> 438939648 -> 4478976 -> 338688 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [11]
• 17 digits:27777789999999999 -> 937638166841712 -> 438939648 -> 4478976 -> 338688 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [11]
• 17 digits:36777778999999999 -> 937638166841712 -> 438939648 -> 4478976 -> 338688 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [11]
• 17 digits:44777779999999999 -> 937638166841712 -> 438939648 -> 4478976 -> 338688 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0 [11]