|December 20, 2001
||Various palindromic observations from Enoch Haga|
WONplate 121 (new)
|December 17, 2001
||Shyam Sunder Gupta started a new website|
This is great! Let us pay him a visit.
Welcome, dear like minded number lover!
|December 1, 2001
||Charlton Harrison found a new record|
110 0010111100 0010101010 1101000011 1010000010
0000101110 0001011010 1010100001 1110100011 =
The binary string contains 83 digits !
the complete list
|November 11, 2001
||Enoch Haga's new book is out !|
"Exploring Prime Numbers on Your PC and the Internet"
WONplate 120 (new)
Haydn, Hindemith, others(?) composed palindromic music !
WONplate 19 (update)
|November 6, 2001
||Playing around with nine- & pandigitals in other bases !|
WONplate 119 (new)
Eric W. Weisstein's MathWorld has returned.
This is great and fantastic news.
Welcome back, dear encyclopedist!
|October 22, 2001
||Have you ever... palindromes in the Golden String !|
WONplate 118 (new)
|October 19, 2001
||Hans Rosenthal found (prime proved) a new 4859-digit|
Smoothly Undulating Palindromic Prime (SUPP for short)
9(89)2429 = (98*104859-89)/99
Compare this with L. C. Noll's old record of 2883 digits !
It took Hans more than 1847 hours to finish the proof.
|October 12, 2001
||Semiprimes are composites with exactly two prime factors.|
Can you find four consecutive semiprimes ?
WONplate 117 (new)
|October 10, 2001
||Ever larger numbers composed of ODD digits (iDem DitO|
for their prime factors) are asked. One example :
15995731573 = 1153 * 1933 * 7177
WONplate 116 (new)
The pandigital version of WONplate 97.
1023687954 * 2901673548 = 2970408257528040792
WONplate 115 (new)
|October 5, 2001
||David Broadhurst and Harvey Dubner announced via the|
NMBRTHRY bulletin board a new palindromic prime
N = (1989191989)15601 containing 15601 digits.
This is not a new record however this palindrome is of
a more varied form and hence considerably
more demanding to prove !
|September 24, 2001
||More palindromic quotients through pandigital numerators .|
WONplate 114 (new)
|September 23, 2001
||I found many more sets of two ninedigital numbers that|
makes a palindromic product !
WONplate 97 (updated)
|September 3, 2001
|| WONplate 113
Jim Fougeron's titanic prime uses only palindromes.
Terry Trotter blended different concepts
in a most beautiful pattern.|
|July 16, 2001
|| FOUR IN A ROW , this time ! All new WONplates.|
Analogical Reasoning (by Klaus Brockhaus) and more
Pattern Power, leading to the Number of the Beast.
A. Murthy's integer sequence A061604 inspired me
to create this Pandigital Programming Challenge.
723121327 a peculiar palprime from Carlos Rivera.
A palindrome story for 89 told by Terry Trotter.
|July 9, 2001
||Preon sent me the complete list of all the|
Ninedigital 'Kordemsky' Divisions.
WONplate 107 (new)
|June 25, 2001
||Hugo Sánchez provides 29 extra
arranged in two categories :
Curiosidades con el número 333667 (primo)
WONplate 106 (new)
|June 17, 2001
||Hans Havermann extended the list of Twin Prime Pairs|
summing to palindromes. Many nice patterns emerges...
WONplate 105 (new)
WONplate 104 (new) A palindromic error, this one !
|June 16, 2001||My page Smoothly Undulating Palindromic Primes (SUPP for|
short) underwent a major upgrade. This was accomplished
thanks to Hans Rosenthal's contribution of probable primes
up to 20001 digits, bringing this collection to the point
where it will serve as a standard reference work
for this kind of numbers, at least that is what we aspire!
|June 15, 2001
||Roberto Botrugno sent in a type P-sopf record (length 62)|
Set of three composites in bi-directional
'Sum Of Prime Factors' progression/retrogression
|June 3, 2001
||Jeff Heleen provided a nice list with polygonals with|
palindromic sides, rank and number but can't remember
whether it's exhaustive or not... can you verify ?
WONplate 103 (new)
|June 2, 2001
||On May 31 2001, I (pdg) found a second record|
palindromic triangular of length 42.
basenumber k=775.781.766.082.836.455.602 with k(k+1)/2=
|May 28, 2001
||Brian Wallace wonders about triangular numbers |
containing all 6's.
WONplate 102 (new)
|May 27, 2001
||Hans Havermann made an impressive contribution|
to my webpage sumprime.htm
Palindromic Sums of Powers of Consecutive Primes
|May 20, 2001
||Pete Leadbetter broke Mike Bennett's record from 1998 by|
finding a new record palindromic square of 52 digits.
64897400105515621177314682 2 =
Definition of a new notion Intrinsic k-palindromic numbers
WONplate 101 (new)
|May 15, 2001
||A Palindrome Question from Maria Gerardina Bulanon|
WONplate 100 (new)
|May 14, 2001
||Harvey Dubner found a new record set of three 2001 -digit|
Palindromic Primes in Arithmetic Progression.
WONplate 99 (new)
|May 1, 2001
||Integer 6643 joins the World!Of Palindromes but|
not through our trustworthy base 10 numbersystem.
WONplate 98 (new)
|April 18, 2001
||Exactly one year after my previous discovery I (pdg)|
found a new record Palindromic Triangular
basenumber k=585.863.634.063.453.017.106 with k(k+1)/2=
|April 10, 2001
||How many palindromes can you find that are the|
products of two ninedigital numbers ?
WONplate 97 (new)
|April 9, 2001
||A follow up to WONplate 36 and a ninedigital variation|
WONplate 96 (new)
|April 5, 2001
||A new record Smoothly Undulating Palindromic Prime|
has been proved rigorous prime by Landon Curt Noll.
This SUPP has a length of 2883 digits 3(73)1441
See also Prime Curios! 37373...37373
|March 26, 2001
||Janean Wilson asked for the largest ninedigital number|
being the product of three 3-digit integers.
WONplate 95 (new)
|March 12, 2001
||Sonja Sharp's puzzling palindromic sequence...|
WONplate 94 (new)
|March 10, 2001
||Today I found the smallest multiplier of 8181 in order|
to arrive at a palindromic product. See WONplate 36
8181 * 1173450678278939 = 9599999998999999959
The next challenge will now be for integer 818181 !
|March 2, 2001
||Palindromic Patterns using Odd and Even tiles.|
Never say NEVER ODD OR EVEN again !
A contribution from Wendy Klassen WONplate 93
|February 26, 2001
||I need more palindromes in the factorial base ! ...|
WONplate 92 (New Topic)
WONplate 89 (Updated)
|February 23, 2001
||A new conjecture sees the daylight ! There ain't a larger|
than 919 ... 929 Primefree Palindrome Interval ...
|February 12, 2001
||Jeff Heleen computed, using UBASIC, all the |
Smoothly Undulating Palindromic Primes
smaller than 843 digits in length.
Dear number cruncher, can you break C. Rivera's record ?
A SUPP of length 1979 1(21)989
|February 10, 2001
||The Nine Digits section has been rearranged|
into three pages and a few new topics were added.
ninedigits.htm the most recent page
ninedig2.htm the second page
ninedig1.htm the first page
|January 30, 2001
||Smallest multipliers to make a number palindromic.
E.g. 81 * 12345679 = 999999999
E.g. 8181 * ? = ?
A topic with quite a mathematical story...|
|January 25, 2001
||Jaime Ayala and his son Jaimito submitted|
a beautiful sequel to the 3x3 palindromic &
'Sophie Germain' magic squares of WONplate 87
Harvey Dubner announces two palindromic prime record.
Three titanic palprimes in arithmetical progression
In fact a re-discovery as Warut Roonguthai
found this set already a year ago...
Six consecutive palprimes in arithmetic progression
|January 14, 2001
||A new record of 14 million digits by Jason Allen Doucette|
The 196 Palindrome Quest
|January 13, 2001
||Kiwoo Song sent me (way back in '99) an intriguing theorem|
about factorials and binary numbers.
Marks R. Nester investigated palindromic structures.
Back to basics...
Updated wonplate 22 about palindrome 1881.
|January 9, 2001
||A nostalgic Jeff Heleen sheds a retrospective view at the|
year 1996 and rediscovers some palindromic primes.
|January 5, 2001
||Jaime Ayala submitted a nice 3x3 palindromic &|
'Sophie Germain' pair of magic squares.
Carlos Rivera added some extra puzzle challenges.
|January 3, 2001
||A new palindromic prime curio !|