For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

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This inflation calculator uses the change in the Consumer Price Index (CPI) from 1913 to 2025 to estimate the U.S. dollar's buying power and future value.

In 1982, a 21-year-old Chris Espinosa faced a familiar challenge in software design: satisfying Steve Jobs’ exacting eye.