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 Welcome all to this maths info-structure !   Allow me to present some recreational topics from the WORLD!OF NUMBERS Best viewed with Internet Explorer

 Latest news [ January 2013 ] Breaking news ! The Searchteam of the MegaPrime projectmade a hit !! A PRP has been found and doublechecking as well as PrimeBase verification and enhancement of the PRP is in progress... 10999999 + 593499 megaprp.htm (update) [ January 8, 2013 ] Darren Bedwell sets a new palindromic prime record with this 314727-digit number 10314727 - 8 * 10157363 - 1 Palindromic Primes Page 2 (update) [ December 2012 ] Pandigital (Probable) Prime Expressions While compiling pandigital PRP's using 4-digit factorials I noticed that the smaller 6-digit displacements emerged 'prime' as well ! WONplate 181 (new)

In this well-filled website you'll find a variety of facts and figures
about topics from the World!Of Numbers . Don't look for a logical
order. It is an amalgamation of randomly gathered numbers, curios,
puzzles, palindromes, primes, gems, your much valued contributions
and more general information. For old time's sake my material,
split up in manageable chuncks, is presented on a silver plate
(of course I'm refering here to the background color!)
just as the various menu's you are familiar with and which are
always at your disposal further on. Enjoy!

Latest project

megaprp.htm Search for the first PRP megaprime of the form 10999999 + y.

A hefty initiative of Kenneth Pedersen.
outputdata1.htm Output data of 10^999999 + y (y < 500000 )
doublecheck.htm Doublechecking PRP candidates

borderprp.htm Border PRP's around 'Powers of ten'

borderprp(0-4999).txt Table in text format from 0 to 4999
borderprp(5000-9999).txt Table in text format from 5000 to 9999
borderprp(10000-14999).txt Table in text format from 10000 to 14999
borderprp(15000-99999).txt Table in text format from 15000 to 99999

intro.htm Introduction to palindromes
year2002.htm Facts and figures about 2002 the last palindromic year
yearmmii.htm Facts and figures about 2002 continued...
palrecs.htm Various palindromic number records
triangle.htm Palindromic triangulars
beautiful.htm The most beautiful palindromic triangular
alltria.htm Exhaustive list of palindromic triangulars
subtria.htm Subsets of palindromic triangulars
detail_A.htm Details Part A from [1] to [49]
detail_B.htm Details Part B from [50] to [99]
detail_C.htm Details Part C from [100] to [149]
tetra.htm Palindromic tetrahedrals
tedet.htm Details of palindromic tetrahedrals
square.htm Palindromic squares
allsquar.htm Exhaustive list of palindromic squares up to length 31
allsquar2.htm List of palindromic squares from length 32
subsquar.htm Subsets of palindromic squares
sqdet.htm Details of palindromic squares
exosquar.htm Extraordinary squares and powers (non-palindromic allowed)
cube.htm Palindromic cubes
cubdet.htm Details of palindromic cubes
circular.htm Circular primes
palpri.htm Palindromic primes overview
palprim1.htm Palindromic primes page 1
palprim2.htm Palindromic primes page 2
palprim3.htm Palindromic primes page 3
palprim4.htm Palindromic primes page 4
palprim5.htm Palindromic primes page 5
judpalpri.htm Assignment 2
assign3.htm Assignment 3

undulat.htm Smoothly Undulating Palindromic Primes - SUPP's
suppsorted.htm SUPP's - Sorted By Length
wing.htm Palindromic Wing Primes - PWP's
pwpsorted.htm PWP's - Sorted By Length
deplat.htm Plateau and Depression Primes - PDP's
pdpsorted.htm PDP's - Sorted By Length
merlon.htm Palindromic Merlon Primes - PMP's
pmpsorted.htm PMP's - Sorted By Length

consec.htm Palindromic pronic numbers of the form n(n+1)
quapron.htm Palindromic quasipronic numbers of the form n(n+2)
consemor.htm Palindromic quasipronics of the form n(n+X)
sequenc.htm More palindromic products of integer sequences
reversal.htm Palindromic products of nonpalindromic integers and their reversals
pythago.htm Palindromic Pythagorean triples
ninedigits.htm The nine digits most recent page
ninedig4.htm The nine digits page 4
ninedig3.htm The nine digits page 3
ninedig2.htm The nine digits page 2
abreu.htm John Abreu's palindrome puzzle
ninedig1.htm The nine digits page 1
twonine.htm Palindromic products of two ninedigital numbers
twopan.htm Palindromic products of two pandigital numbers
propan3.txt List of palindromes as products of two pandiagonals
sumsquare.htm Palindromic sums of squares of consecutive integers
pocosupa.htm Powers of Consecutives Summing to Palindromes
sumcube.htm Palindromic sums of cubes of consecutive integers
sumprime.htm Palindromic sums of powers of consecutive primes
sumpower.htm Palindromic quasi_under_squares of the form n+(n+1)^2
varipal.htm Various palindromic sumpatterns
penta.htm Palindromic pentagonals
pendet.htm Factorization of the palindromic pentagonals
hexa.htm Palindromic hexagonals
hexdet.htm Factorization of the palindromic hexagonals
hepta.htm Palindromic heptagonals
hepdet.htm Factorization of the palindromic heptagonals
octa.htm Palindromic octagonals
ocdet.htm Factorization of the palindromic octagonals
nona.htm Palindromic nonagonals
nondet.htm Factorization of the palindromic nonagonals
squadd1.htm Palindromic incremented squares of the form n^2+1
quasisq.htm Palindromic quasi_over_squares of the form n^2+(n+1)
quasimor.htm Palindromic quasi_over_squares of the form n^2+(n+X)
nobase10.htm Palindromic numbers beyond base 10
palconca.htm Palindromic subsets of concatenated sequences

Prime factors of ...
topic1.htm Home Primes -
Repeated factorisation of concatenated prime factors of the composites
factorlist.htm the concatenated numbers from Sm1 up to Sm100
revfact.htm the reversed concatenated numbers from Rsm93 down to Rsm1
repunits.htm the repunits from R1 up to R100

truncat.htm List of the 4260 left-truncatable primes
threedigits.htm Squares containing at most three distinct digits
crump.htm Finding Tridigital Squares using the 'Quadratic Residues' technique
samedigits.htm Numbers whose digits occur with same frequency + Classific. P2
class_P3.htm Classification P3
class_P4.htm Classification P4
class_P5.htm Classification P5
trisopf.htm Sets of 3 composites in bidirectional SOPF progression/retrogression
firstpal.htm Sum of first n 'type of numbers' is palindromic
pictures.htm Some (not so) recent photographs of the editor of this website
mpjscalc.htm Multiple precision JavaScript calculator
isolatin.htm Iso Latin I character set
colors.htm All the 140 colourful exotic color names
whatsnew.htm What is new in my website ?
arch_new_2002.htm Whatsnew? archive of 2002
arch_new_2001.htm Whatsnew? archive of 2001
arch_new_2000.htm Whatsnew? archive of 2000
brierproject.htm The Prime Brier Brothers Project
search.htm Pop Up from this 'homepage'
bennett.htm Pop Up from 'square.htm' & WONplate 74
dna.htm Pop Up from WONplate 17
huen.htm Pop Up from WONplate 17
sedo.htm Pop Up from WONplate 16
wilson.htm Pop Up from 'square.htm'

borderprp.htm Border PRP's around 'Powers of ten'
borderprp(0-4999).txt Table in text format from 0 to 4999
borderprp(5000-9999).txt Table in text format from 5000 to 9999
borderprp(10000-14999).txt Table in text format from 10000 to 14999
borderprp(15000-99999).txt Table in text format from 15000 to 99999

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For the prime fans !

Integer Sequences

To look up a number sequence in Sloane's
On-Line Encyclopedia of Integer Sequences,
enter it here and click "Submit":

To list all OEIS submissions from Patrick De Geest
To list all OEIS sequences with keywords Palindrome or Palindromic
Prime Curios! Prime Puzzles The Digits Project Richard Phillips