Curious sums of fifthpowers.  

  A puzzle about lifting a cable up one meter around the world.  

  A puzzle about suspending a cable of 50 kilometers and 1 meter extra.  

  A puzzle about left- and right-handed persons.  

  729927 a cyclic palindrome.  

  Searching for sums of five fifthpowers.  

  Detecting patterns in sum of the first n palindromes.  

  Spotting palindromes 78087 and 672276  
  in the formula for indexing Fibonacci numbers.  

  Bringing palindrome 10901 into an interesting state  

  Every positive integer can be expressed as the sum of maximum three palindromes  

  Building a relationship between the natural numbers and the ninedigitals  
  using the surjective function described in WONplate 224  

  Prepending n digits d to k so that [d^^n][k] becomes a record delayed prime  

  Smallest multipliers to make a number palindromic in bases 2 to 12  

  Highlighting semiprime palindromes and their merit scores.  

  Invitation to find prime factors of SUPP's or SUP's  
  Invitation to search for ever larger NSUP primes.  

  Searching for a palindrome with various factor-lengths  
  representing my birthdate October 9, 1956  

  Adding digits to n (beyond base 10) so that n becomes  
  a record delayed prime {or a FEP = First Encountered Prime}  

  Minimal primes in other bases  

  Operations with nine- & pandigital factors creating palindromes  

  Pandigital 1253098674 lies at the base of a palindromic curiosum  

  Sequence & patterns with n and φ(n) both palindromes  

  Building sequences out of concatenated palindromes  

  Exploring Mendeljev's palindromes  

  Record palindromic substrings in the decimal expansion  
  of various types of numbers  

  Ascending meta_ninedigital prime factors in the list  
  of palindromic squares and how to program them  

  Playing around with recreational examples of various types  
  like combinations using squares, factorials and other functions  

  Investigating prime multidigit subsequences in the list of 9!  
  ninedigital numbers and a programming challenge following it  

  Langford's problem versus double pandigital numbers  

  9583859 a curious Palindromic Prime  

  A palindromic date to remember !  

  The superpermutation of 123 turns out to be the following  
  length_nine palindrome 123121321  

  The discovery of new irregular non-palindromic and without  
  ending with zero square number reversals  

  A primorial way to search for (probable) primes  

  The rarity of sporadic square reversible numbers that are not  
  palindromic and without ending with zero  

  The mean merit of the borderprime gaps converges to 2  

  Search for the smallest numbers that when appended by the same  
  amount of digits 1, 3, 7 and 9 generates primes in all four cases  

  Missing solutions for the smallest palindrome k > n such that  
  k/n is a square  

  The sum of two numbers, their squares and their cubes  

  Adding 1's, 3's, 7's and 9's to n so that n becomes a record  
  delayed prime and more derived challenges along the way  

  Expressing the natural numbers as an absolute difference  
  between two powers  

  Finding a pandigital as a substring in the decimal expansion of  
  that same pandigital raised to a power  

  A new twist on Home Primes  

  Exploring nine- and pandigitals expressible as sums  
  of two squares  

  n and n_reversed are square numbers whose roots may also  
  be [ pseudo-] reversible  

  n and its reverse are one less than a square number  

  OEIS Reference Table for primes of the form 10ⁿ ± d  
  and searching for some patterns  

  Plea for interpreting ninedigitals with a leading zero as pandigitals  

  Gathering prime factors of nine- and pandigitals and extracting  
  statistical information from the data  

  Expressing nine- or pandigitals as sums of powers of 2 and/or 3  

  Saying goodbye to 2013 and welcoming 2014  

  Multiplying and dividing ninedigitals by 2  

  Innovative Cashier  
  The topic began in WONplate 179 and continues here  

  A selection of pandigital expressions found on the net  

  Gathering strictly pandigital probable primes (PRP's) of the form  
  ' ab^cdef +/- ghij ' and various other formats  

  Pandigital PRP's of the form ' abcd! +/- efghij '  
  (a 4-digit factorial and a 6-digit displacement)  

  A distinct palindrome becoming a product of two pandigitals  

  All numbers above 23 are either Powers or Sums Of Powers  
  and a topic involving combining numbers with their reversals  

  Searching for ever larger sporadic palindromes of the form  
  A^p + B^q (Sum Of Powers)  

  A 42/42 palindromic/pandigital Bi-Forked Wheel  

  A Happy New Year (2009) to everyone !  

  Multiplying Palindromes to arrive at a wheel of Pandigitals  

  Hopping Numerals  

  Blending palindromes and nine- & pandigitals using multiplication by 9  

  A pandigital puzzle from professor Seppo Mustonen,  
  author of Survo MM

  A random walk around the powers of ten  

  A ninedigital enigma  

  Two nice consecutive primes  

  Pandigital Curios  

  “Wonders of Numerals” written by ➜  

  The Beast's real mark devalued to 616  

  An amazing Palindromic Circle  

  Equations concerning Pythagorean Theorem and  
  Fermat's Last Theorem  

  List of palindromic areas of primitive Pythagorean triangles  

  Sumas Palindromizadas con Factores de Corrección  
  Números Naturales del 1 al 100  

  Nearest (probable) primes bordering powers of ten situated at equal distances  

  Two Prime Numbers starting from 18 and 19  

  Numbers and their reversals have a difference divisible by 9  
  and a sum divisible by 11 and a palindromic endresult  

  Extracting Palindromes from Pi (e.g. 7446447 & 110000011)  

  Find larger and larger palindromic primes  
  dividing numbers of the form k.bⁿ ± 1 (k > 1)  

  A simple procedure to arrive at palindromes  

  ABBA primes  

  December 1, 2003, not merely a date...  
  46664, not merely a palindrome...  

  Patrones Palindromicos con Multiples Operaciones Aritmeticas  

  Tautonymic numbers  

  Recurring last digit multiplication numbers  

  Top3000+ palindromic primes with prime digits  

  Expressions with a palindromic look  

  Concatenate two (almost) neighbouring primes  
  so that you end up with a square  

  181, 313 & 545 are the only Plateau and Depression Primes  
  equal to the sum of the squares of two consecutive integers  

  A threefold (probable) prime search  

  Palindromic sums of powers of (at least two) consecutive numbers  

  A free forum for Gigantic Primes  

  Palindromic Primes stretching out until...  

  Double Cross Palindromes  

  Literary Primes  

  8778 a curious Palindromic Triangular  

  1|9|9|1 a vertical palindrome  

  An irrational palindromic number  

  11 ways to arrange the ninedigits  

  Interesting pattern in reciprocals  

  A very unique palindrome 549945  

  JavaScript Palindrome tester  

  Primes remaining prime when its digits are intertwined  
  with their SOD (Sum Of Digits) strings  

  Antimagic Squares using Primes with sums in Arithmetic Progression  

  Powers of Palindromes as products of integers and their reversals  

  Substrings in Primes of Composite length  

  Magic Squares composed of only Palindromic Primes  

  Keithing to 2002... an exploration, a search for patterns  

  Power of Patterns  

  An interesting tetradic prime  

  The smallest composites of length n that are  
  pseudoprime to base 2  

  Find more palindromic pseudoprimes to base 2  

  Bringing democracy into the Rabbit series  

  Numbers equal to the sum of (at least two) consecutive integers  
  & numbers equal to the sum of (at least two) consecutive primes  

  Various palindromic observations  
  To start with... welcome to palindromic WONplate 121 !  

  Enoch Haga's new book (“Exploring Prime Numbers”) is out  
  A must for all prime number lovers  

  Exploring Nine- & Pandigitals in other bases... your turn  

  Have you ever... palindromes in the Golden String !  

  Four in a row_▪▪▪▪  Semiprimes !  

  An ODD_DDO puzzle question ➜ 1 3 5 7 9  

  How many palindromes can you find  
  that are the products of two pandigital numbers ?  

  Palindromic quotients through pandigital divisions  
  (zerofree pandigital or ninedigital variation appended)  

  A titanic prime expression using only palindromes  

  A magical blending of different concepts in a most beautiful pattern  

  Analogical Reasoning and The Power of Patterns  

  A Pandigital Programming Challenge based on sequence A061604  

  723121327 a peculiar palindromic prime  

  A palindrome story for 89  
  and a Fibonacci story for \( {1 \over 89} \)

  Ninedigital 'Kordemsky' Divisions (complete list)  

  29 extra Palindromic Patterns (Productos Palindrómicos)  

  More Palindromic Sums of Twin Prime Pairs  

  The Most Unpopular Palindrome must be... 404  

  Polygonals with palindromic sides, rank and number  

  Palindromic Triangulars containing only 6's  

  Intrinsic k-palindromes  

  A Palindrome Question ➜ Can numbers  
  from 1 to k (in order) ever become palindromic ?  

  Palindromic Primes in Arithmetic Progression  

  Integer 6643 joins the World!Of Palindromes !  

  How many palindromes can you find  
  that are the products of two ninedigital numbers ?  

  A follow-up from WONplate 36 and a new ninedigital puzzle  

  A Ninedigital Divertimento  

  A Puzzling Palindromic Sequence  

  Palindromic Patterns using Odd & Even Tiles  

  Palindromes in factorial base and base 10  

  Primefree Palindrome Interval  

  Two Palindromic Prime Records  

  Factorials and Binary Numbers  

  Counting palindromic patterns  

  A Palindromic & 'Sophie Germain' pair of magic 3x3 squares  

  Palindromic Prime Curios and Cubes  

  Nine Digits Digressions  

  Palindromic Patterns  

  Repdigits, or numbers with repeated digits  

  Leisure time An addictive 4 X 4 shuffle board  

  The palindrome Fifty Five or 55  

  Some curious polygonals  

  Some old and new discoveries about the Number of the Beast 666  

  Sets of three composites in bi-directional  
  'Sum Of Prime Factors' progression/retrogression  

  A Home Prime breakthrough  

  Pi function for a special palindrome 𝜋(34543)  

  A webpage around palindromic heptagonals  

  Probability of finding palindromic squares and cubes  

  The sum of the first 202 composite numbers is 27072  

  A combinatorial problem  

  Arranging all the base b representations of palindrome 31113  

  Find more smallest Squares and Cubes whose digits  
  occur a same number of times  

  Palindromic sum of two consecutive primes  
  equal to the sum of their reversibles  

  All the left-truncatable primes  

  An Interpalindromicum (1991–2002)  

  Partitions of the Number of the Beast 666  

  Inserting any digit d between adjacent digits of palprime 13331  
  never produces a new prime !  

  An all palindromic diophantine equation intermezzo  

  Palindromes in the decimal expansion of  𝜋  

  Four international palindrome occurrences  

  Two new gems about nine- and pandigitals !  

  A prime free zone beginning with a palindrome  

  One of a kind palindrome 21312  

  Magic Squares with palindromic primes  

  A square that is a palindrome in binary  

  An original puzzle involving primes  

  A beautiful find this palindrome 3467643  

  Special operations leading towards palindromes  

  A palindromic chain reaction  

  My favourite palindrome 323323  

  Some older site recommendations  

  The On-Line Encyclopedia of Integer Sequences (OEIS)  

  An entertaining palindromic puzzle  

  Concatenating prime factors  

  The most seksiest palindrome ever ➜ starting with 69  

  More palindromic_free numbers  

  Some beautiful patterns resulting in palindromes  

  Finding non-palindromic numbers by multiplying with their reversals  

  Operations with consecutive integers  

  Excerpt from the book “The Moscow Puzzles” by ➜  

  Properties of the number 153  

  Sequences in the expansion of  𝜋  

  Palindromes and Books  

  Record Palindromic Triangulars  

  Approximating 𝜋 with Palindromes  

  Smallest multipliers to make a number palindromic  

  Programming for palindromes  

  89298 is a remarkable palindrome  

  About Palindrome 888  

  About Palindrome 22 and others as well  

  1001, a Scheherazade palindrome !  

  1001, 2002, 3003, ... featuring in Pascal's triangle  

  A beautiful cryptic prime curio about palprimes 191 & 383  

  Palindromic_free squares, cubes and primes  

  Pattern excerpts from Mathematical Recreations books  

  Palindromic Square 69696 = 264²  

  323232323 is a smoothly undulating palindromic prime  

  Magic Square with sum of rows equal to the root of a palindrome  

  19291 and 124060421  
  constitute a remarkable palindromic duo  

  About palindrome 1881  

  Even the Number of the Beast is a palindrome !  

  Palindromic Rheumatism  

   There is palindromic MUSIC in the air. Hear it out !  

  ANS or the Alternative Number System  

  Numbers whose product is the reversal  
  of the product of their reversals  

  A peculiar palindrome puzzle  

  Basenumbers and binary looking palindromic powers  

  A Beastly Magic Sum  

  Palindromes and anagrams  

  Palindromic Carmichael numbers like 101101  

  A palindromic soccer event  

  Magic wishes for 1998  

  Magic Squares and Palindromes  

  6n – 1 and 6n + 1  

  During the year 1999 this was the first paragraph of my homepage !  

  Palindromes in orbit  

  A retrospective view (5 years!) and  
  some palindromic primes for 1996  

  The 196 Palindrome Quest  

  Articles about reversals and palindromes  

  What are Palindromes ?  

  Table of Contents