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

Sharp Memorial Hospital is the first hospital system in San Diego to use a revolutionary technology to destroy cancerous tumors. It's called histotripsy.

The @ symbol can also appear in regular formulas outside of tables when Excel thinks you're trying to reference a single value from a range. If you see it pop up unexpectedly, it usually means Excel ...

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