In hexadecimal, all Mersenne numbers greater than 127 end with the digit F repeated several times, while all Fermat numbers greater than 17 are written with several significant zeroes book-ended by two 1’s.
The hexadecimal is a mixed formation of a Greek begin and a Latin end. There is also a less used synonym hexadecadic of purely Greek .
Some divisibility tests in hexadecimal are:
is divisible by 2 if its least significant digit is 0, 2, 4, 6, 8, A, C or E.
is divisible by 4 if its least significant digit is 0, 4, 8 or C.
is divisible by 8 if its least significant digit is 0, or 8.
is divisible by 15 if it has digital root F.
is of course divisible by 16 if it ends in a 0.
|Date of creation||2013-03-22 16:20:27|
|Last modified on||2013-03-22 16:20:27|
|Last modified by||PrimeFan (13766)|