Kamaraj | Investor

Bad grammar is thhe new proof of being human

Take your card number and starting from the second-to-last digit, double every second digit moving left. If doubling a digit produces a number greater than nine, subtract nine from the result. Then add all the digits together, the doubled ones and the untouched ones. If the total is divisible by ten, the number is valid. If it isn’t, the number is mathematically impossible as a card number and the form rejects it on the spot. This is the Luhn algorithm written in 1954 by a computer scientist at IBM named Hans Peter Luhn. It still runs inside every payment form on the internet today. And it turns out that valid card numbers are not random. They follow this mathematical rule, and any number that breaks it is immediately disqualified without ever touching a bank’s systems. No server contacted. No database checked. No network request made. The validation happens entirely on your device, in milliseconds. The first six digits do additional work before the Luhn check even runs. They are called the Issuer Identification Number; the first digit identifies the card network (4 means Visa, 5 means Mastercard, 3 means Amex), and the following digits identify the specific bank that issued the card. This is why payment forms show you the Visa or Mastercard logo the moment you type the first digit. No server needed. The network is encoded in the number itself. The last digit of every card number is called the check digit it exists for no other purpose than to make the entire number pass the Luhn algorithm. When a bank generates a new card number, it calculates what the last digit must be to make the sequence valid, then stamps it on the card. It is a built-in mathematical fingerprint.

Not hating but Apple needs to fix this ..

Found these bottles at JAI T2 🙂 Many other brands were there, named after India’s iconic places. Which other brands do you know? Disc: alcohol consumption is unhealthy especially at excess dosage. Behave responsibly.

BREAKING : Sri Lanka 🇱🇰 has denied permission to the United States 🇺🇸 for landing its war planes in the country and use it for the war against Iran. 🔥 This tiny island nation has more SPINE than many so called super powers 🫡👏🏻

How the fvck did I not know that!? 😭

Jeff Bezos, worth $234 billion, plans to replace 600,000 Amazon workers with robots. Now, he wants to spend $100 billion to fully automate not just his warehouses, but factories in the U.S & other countries. Oligarchs are waging all out war against workers. FIGHT BACK.

no bro don’t buy airpods. you need the Sony WH-1000XM5-WHCH720N-WF1000XM5-CH520

Stations That Generate Most Revenue 🤯 1) New Delhi~ ₹3,337 Crore 2) Chennai Central~ ₹1,299 Crore 3) Secunderabad Telangana~ ₹1,276 Crore 4) Howrah Junction (WB)~ ₹1,276 Crore 5) Hazrat Nizamuddin~ ₹1,227 Crore 6) Benaras Railway~ 1,1….Show more