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The Luhn algorithm, also known as the mod 10 algorithm, is a simple formula to validate identification numbers. It involves doubling every second digit, summing the digits, and subtracting the modulus 10 from the sum.
ExxonMobil is an American multinational oil and gas corporation and the largest direct descendant of Standard Oil. It operates worldwide, produces about 3% of the world's oil and 2% of the world's energy, and has been involved in many environmental incidents and climate change denial.
XTO Energy is a petroleum company that produces, processes, transports, and develops oil and natural gas resources in North America. It was founded in 1986 and acquired by ExxonMobil in 2010, and specializes in shale gas production via hydraulic fracturing and horizontal drilling.
On the Run is a flagship convenience store brand developed by ExxonMobil, used at Exxon and Mobil stations in the United States and at Esso and Mobil stations internationally. Learn about its history, locations, divestments, operations, awards and trade mark court case in Australia.
Shell plc is a public company that produces and sells petroleum, natural gas, lubricants, petrochemicals and other products worldwide. It was formed in 2005 by the merger of Royal Dutch Shell and Shell Transport and Trading, and has a history dating back to 1907.
A JavaScript function can check to see if a phone number is a valid format, i.e., is numeric, starts with a valid set of numbers ("0" for local, or an international dialing prefix followed by a valid country code and is not too short to be a phone number. At first a JavaScript function is used to clear out any spacer characters.
Learn how ExxonMobil, the largest oil and gas company in the world, evolved from Standard Oil, founded by John D. Rockefeller in 1870. Find out when Exxon and Mobil merged in 1999 and how they became the successors of Standard Oil.
Syncrude is a joint venture by four partners that produces synthetic crude oil from oil sands in Alberta. It has a history of expansion, ownership changes, and environmental controversies, such as greenhouse gas emissions and tailings pond water.