The accumulation of misfolded proteins in the brain is central to the progression of neurodegenerative diseases like ...

It was invented by Hans Peter Luhn of IBM. It's used to determine if the credit card numbers have a logical pattern. If the numbers don't work with the algorithm, it isn't a valid credit card number.

Instagram now gives you the ability to reset your algorithm. If you're seeing posts you have no interest in, this could be an opportunity to fix it.