World!OfNumbers |
WON plate 121 | |
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[ Enoch Haga's observation from [ December 20, 2001 ]"The vertical palindrome" Starting with prime p = 103 up to 149 which are consecutive, taking p and successively adding its digits to the next prime, we have
a vertical palindromic sequence (unfortunately not prime) originates I am confident that someone can find longer such palindromic sequences !
When will we have another palindromic number of digits ? Lastly Enoch noticed that M22 and M23 differ in length by | |||||||||||||||||||||||||

A000121 Prime Curios! Prime Puzzle Wikipedia 121 Le nombre 121 |

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