Multiplicative_persistence
Multiplicative digital root
Mathematical formula
In number theory, the multiplicative digital root of a natural number in a given number base is found by multiplying the digits of together, then repeating this operation until only a single-digit remains, which is called the multiplicative digital root of .[1][2] The multiplicative digital root for the first few positive integers are:
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 2, 4, 6, 8, 0, 2, 4, 6, 8, 0, 3, 6, 9, 2, 5, 8, 2, 8, 4, 0. (sequence A031347 in the OEIS)
This article needs additional citations for verification. (October 2019) |
Multiplicative digital roots are the multiplicative equivalent of digital roots.