Quote:
Originally Posted by paulunderwood
It looks like the cofactor is given: 765044109502655639249

I reserved two more to actually run. "First PRP tests on Mersenne cofactors." I remember factors being in quotes for ECM's. I had an idea that the number above was similar in purpose.
Quote:
Originally Posted by Google
A Cofactor, in mathematics, is used to find the inverse of the matrix, adjoined. The Cofactor is the number you get when you remove the column and row of a designated element in a matrix, which is just a numerical grid in the form of rectangle or a square.

Alright, I will take their word for it.