W orld ! O f N umbers HOME plates| Welcome all to this maths info-structure ! Allow me to present various recreational topics from the WORLD! OF NUMBERS
In this well-filled website you'll find a multitude of facts and figures W orld ! O f N umbers . Don't look for a logical Enjoy! Patrick De Geest
Nieuw
from to ,Ir. Jos Heynderickx and myself (Patrick De Geest ). Geniet ervan! Jos & Patrick
Introduction via links to palindrome sites
Some thematic websources
Various palindromic number records
3
Palindromic triangulars
The most beautiful palindromic triangular
Exhaustive list of palindromic triangulars
Subsets of palindromic triangulars
Details Part A from [1] to [49]
Details Part B from [50] to [99]
Details Part C from [100] to [200]
Palindromic tetrahedrals
Details of palindromic tetrahedrals
New
Exhaustive list of palindromic squares up to length 31
Complete list of the sporadic square palindromes (SSP's)
Subsets of palindromic squares
Details of palindromic squares
Extraordinary squares and powers (non-palindromic allowed )
Palindromic cubes
Details of palindromic cubes
5
Palindromic pentagonals
Details of palindromic pentagonals
Details of palindromic hexagonals
7
Palindromic heptagonals
Details of palindromic heptagonals
Details of palindromic octagonals
Details of palindromic nonagonals
Centered palindromic polygonals
Palindromic primes pages info overview
Palindromic primes page 1
Palindromic primes page 2
Palindromic primes page 3
Palindromic primes page 4
Palindromic primes page 5
Palindromic primes page 6
Assignment 2
Assignment 3
Palprimes where the sum over all digits is a minimum
Multiple Palprimes “Four in a row”
Circular primes
Smoothly Undulating Palindromic Primes - SUPP's
SUPP's - Sorted By Length
SUP(P) Factorization lists
Near Smoothly Undulating Primes with 6-digit undulators
Near Smoothly Undulating Primes with 22-digit undulators
Palindromic Wing Primes - PWP's
PWP's - Sorted By Length
Palindromic Plateau and Depression Primes - PDP's
PDP's - Sorted By Length
Some PDP Factorization lists
Palindromic Merlon Primes - PMP's
PMP's - Sorted By Length
PMP Factorization lists
The nine digits page 1
The nine digits page 2
The nine digits page 3
The nine digits page 4
The nine digits page 5
The nine digits page 6
The nine digits page 7
John Abreu's palindrome puzzle
Palindromic products of two ninedigital numbers
Palindromic products of two pandigital numbers
List of palindromes as products of two pandiagonals
Palindromic pronic numbers of the form n(n+1)
Palindromic quasipronic numbers of the form n(n+2)
Palindromic quasipronics of the form n(n+X)
Palindromic incremented squares of the form n^2+1
Palindromic incremented squares of the form n^2+X
Palindromic decremented squares of the form n^2–X
Palindromic quasi_over_squares of the form n^2+(n+1)
Palindromic quasi_over_squares of the form n^2+(n+X)
Palindromic quasi_under_squares of the form n+(n+1)^2
Palindromic sums of squares of consecutive integers
Powers of Consecutives Summing to Palindromes
Palindromic sums of squares of odd & even consecutives
Palindromic sums of cubes of consecutive integers
Palindromic sums of powers of consecutive primes
Various palindromic sumpatterns
Sum of first n 'type of numbers' is palindromic
More palindromic products of integer sequences
Palindromic products of integers with their reversals
Palindromic Pythagorean triples
Palindromic subsets of concatenated sequences
Palindromic numbers beyond base 10
Page 1 - Palindromic in base 10 and bases 2 to 36
Page 2 - Palindromic squares in bases 2 to 17
Page 3 - Simultaneous palindromic in two bases less than 10
Page 4 - Palindromic cubes in bases 2 to 17
Factorization
Home primes -
Repeated factorization of concatenated prime factors
The concatenated numbers from Sm1 up to Sm200
The reversed concatenations from Rsm1 up to Rsm200
The repunit prime factors from R1 up to R100
Facts and figures about 2002 the last palindromic year
Facts and figures about 2002 continued...
List of the 4260 left-truncatable primes
Squares containing at most three distinct digits
Finding Tridigital Squares using 'Quadratic Residues'
Numbers whose digits occur with same frequency - Cl. P2
Classification P3
Classification P4
Classification P5
Sets of 3 composites in bidirectional SOPF pro-/retrogression
The Prime Brier Brothers Project
Search for the first PRP megaprime of the form 10^999999+y
Output data of 10^999999 + y (y < 500000 )
Doublechecking PRP candidates
An ongoing project
Border PRP's around 'Powers of ten'
Table in plain text from 00000 to 04999
Table in plain text from 05000 to 09999
Table in plain text from 10000 to 14999
Table in plain text from 15000 to 19999
Table in plain text from 20000 to 24999
Table in plain text from 25000 to 29999
Table in plain text from 30000 to 34999
Table in plain text from 35000 to 99999
Packed list of all PRP's of the form 10^n – d up to 30000
Packed list of all PRP's of the form 10^n + d up to 30000
Discontinued
What was new in my website?
Whatsnew? archive of 2002
Whatsnew? archive of 2001
Whatsnew? archive of 2000
Some handy tools
Multiple precision JavaScript calculator
Iso Latin I & Unicode character set
All the 140 colourful exotic color names
Some loose ends
Some old photographs of the editor of this website
Google Search Pop Up from this very homepage
Pop Up from 'square.htm' & Wonplate 74 - Probability
Pop Up from Wonplate 17 about DNA
Pop Up from Wonplate 17 - Analyse
Pop Up from Wonplate 16 - Small Puzzle
Pop Up from 'square.htm' on pseudo palindromes
Worksheet - Palindromic Sums of Powers
Millennium date palindromes
Worksheet - Sequence from Wonplate 197
Worksheets from Wonplate 197
Integer Sequences
To look up a number sequence in Sloane's
On-Line Encyclopedia of Integer Sequences ,
To list all OEIS submissions from Patrick De Geest Palindrome or Palindromic Prime Curios! Prime Puzzles The Digits Project Richard Phillips What's Special About This Number? The Zero Saga Numberland 1-100 Le Nombre 0 Nombre zéro et toutes les connotations associées Wikipedia 0 (number) 
Patrick De Geest 
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- Short Bio - Some Pictures