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[ July 16, 2022 ]
Searching for a palindrome with various factor-lengths
representing my birthdate October 9, 1956.
Patrick De Geest

I know that I give away a part of my privacy with this WONplate and
that it is even a rather narcissistic effort. Yet it might link my person
to a for now unknown “palindrome” that factorizes in one of three ways
and finding them would make me, no doubt, very happy.

Palindrome P1 =   < p9 > * < p10 > * < p56 > 
Here the year 1956 is shortened to 56 and the 19 part is implicit.

Palindrome P2 =   < p9 > * < p10 > * < p19 > * < p56 > 

Palindrome P3 =   < p9 > * < p10 > * < p1956 > 

Till now I don't know if this puzzle is easy or hard.
If you like the challenge be my guest !

What can I bring forward to shorten the search? E.g.
Well the palindrome must be of odd length (uneven) otherwise
the factor 11 would appear but < p2 > is not part of the answer.
The palindrome itself cannot be even as 2 or a < p1 > is not allowed.
It can not start or end with digit 5 for the same reason.
But then again three primes multiplied together can never
result in an even number or ending with 5 is it not...

And what about our current year 2022 split up like this:

Palindrome P4 =   < p20 > * < p22 > 

Maybe here we have a feasible card.


A000220 Prime Curios! Prime Puzzle
Wikipedia 220 Le nombre 220














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Patrick De Geest - Belgium - Short Bio - Some Pictures
E-mail address : pdg@worldofnumbers.com