Franklin magic square

One day in 1771, Benjamin Franklin, tired of hearing political debates, amused himself by creating the following magic square, now called a Franklin magic square:


The magic constant is 260. Furthermore, half any row or column (positions 1 to 4 or 5 to 8) equals half the magic constant. Two centuries later, Joseph Madachy realized that some half diagonals from the corner to the center also give 260.

Some other 8 by 8 magic squares with these properties are also called Franklin magic squares.

Title Franklin magic square
Canonical name FranklinMagicSquare
Date of creation 2013-03-22 16:24:52
Last modified on 2013-03-22 16:24:52
Owner PrimeFan (13766)
Last modified by PrimeFan (13766)
Numerical id 4
Author PrimeFan (13766)
Entry type Example
Classification msc 05B15
Classification msc 01A50
Synonym Franklin square