Math Fun: What Is Emirp?

Do you know what "emirp" is? An emirp is a prime whose reversal is a different prime. A cyclic emirp is an emirp that generates only more emirps when the last digit is successively moved to the front (or vice-versa). The largest known cyclic emirp is 939,391.

Thought of The Day

28th July 2020 “Gain may be temporary and uncertain, but ever, while you live, expense is constant and certain” — Benjamin Franklin

4 Zen Stories

I read an interesting post on Twitter which was about 4 Zen stories and thought of posting them here. I’m an introvert. I overthink. It’s what we do. My mind is always on, and even on good days, it can be hard to feel calm. Part of this is human nature — our brains are... Continue Reading →

Thought of The Day

27th July 2020 "Change is hard because people overestimate the value of what they have -- and underestimate the value of what they may gain by giving that up."

Thought of The Day

26th July 2020 "Water is fluid, soft, and yielding. But water will wear away rock, which is rigid and cannot yield. As a rule, whatever is fluid, soft, and yielding will overcome whatever is rigid and hard. This is another paradox: what is soft is strong" — Lao Tzu

Chess Puzzle

This is an amazing position. Guess the move found by Paul Morphy as Black. Black to move and win. Game: Napoleon Marache vs Paul Morphy, 1857.

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