Template:Sequence of the Day for August 21

Intended for: August 21, 2011

Timetable

• First draft entered by Alonso del Arte on May 28, 2011 ✓
• Draft reviewed by Alonso del Arte on August 16, 2011 ✓
• Draft approved by NOT AL on August ??, 2011

Yesterday's SOTD * Tomorrow's SOTD

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A080790: Binary emirps.

{ 11, 13, 23, 29, 37, 41, 43, ... }

Looking at these in the binary numeral system, we see that if we read them backwards, we obtain different prime numbers.