Because Luhn’s algorithm requires so little processing power, the computer handling the transaction can also run the check without needing to contact any third party.

Your card number is carefully structured. The very first digit is what’s known as the major industry identifier. A 4 means ...

American journalist Alec Luhn recounted his harrowing survival in Norway’s wilderness after a hiking accident left him with a broken leg.

Alec Luhn, a 38-year-old journalist who has worked for The Guardian, The New York Times and The Atlantic, is speaking out for the first time since his dramatic rescue in Norway. "I was grateful to ...

Wisconsin native and journalist Alec Luhn is speaking out after a dramatic rescue while hiking in Norway. He survived 6 days with broken bones.

Alec Luhn, 38, an American journalist, hopes the lessons he learned from his ordeal in a national park in Norway can help others.

It was a Thursday and Luhn recognized that he would likely have to survive several days in the wilderness, with his wife not expecting to hear from him until Monday.

Alec Luhn survived six harrowing days trapped in Norway's wilderness with a broken leg by drinking his own urine, eating grass and moss.