... Yes it seems so. Perhaps I was looking at it in the wrong way. How about if the number of digits is not prime then the number will also be not prime? ...
Sha99y
sha99y00000@...
Jul 1, 2000 7:07 pm
3514
No, you are right, in binary or in any base: a Repunit number can't be prime if the number of digits is not prime You also have a nice propriety : whatever...
Didier HALLÉP...
dhallepee@...
Jul 2, 2000 11:54 am
3515
Here's a little proof of my very own for binary numbers, of a result you're hinting at. Any binary number made up of a sequence repeated twice, is not prime. ...
Paul Smith
paul@...
Jul 2, 2000 3:45 pm
3516
Consider the following: 31 is a prime, so is: 331 3,331 33,331 333,331 3,333,331 33,333,331 Is the next number in this series a prime ? Does this kind of...
Mike Boyle
mike@...
Jul 2, 2000 7:11 pm
3517
This well-known example is discussed at some length in Singh's first book. ... From: Mike Boyle <mike@...> To:...
Richard Kaplan
kaplan@...
Jul 2, 2000 7:56 pm
3518
Stage 6 bites the dust at last! I finally figured out how to write a GA (or is it a shotgun hillclimber?) and let it loose on stage 6 after having spent quite...
el_supremo@...
Jul 2, 2000 9:15 pm
3519
As far as I know: For R(2) to R(100) the only repunits are 2,19 and 23. I'll test some more and try and find a counter-example. Next few repunits where number...
Matt Whitby
matt.whitby@...
Jul 3, 2000 12:46 am
3520
... more ... <snip> The next are R(317) and R(1031), no others below R(10,000) - as per my previous message and David M Burton's "Elementary Number Theory"...
A Channing
achanning@...
Jul 3, 2000 2:12 pm
3521
But the next number in your series 333,333,331 can be factored to 17 * 19,607,843 and the following number 3,333,333,331 to 673 * 4952947. Matt Whitby ...
Matt Whitby
matt.whitby@...
Jul 3, 2000 3:08 pm
3522
... And the answer is: it's a monoalphabetic substitution using the key SUNLIGHTABCDEFKMOPQRVWXYZ and the text reads: IN MEMORY OF MANY HAPPY TIMES YOU ARE...
Mike Boyle
mike@...
Jul 3, 2000 4:16 pm
3523
I would really appreciate help to find a DES program, in C or C++, which I can feed with key and plaintext & get back codetext. I have read FIPS PUB 46-2, but...
Mike Cowan
mikejcowan@...
Jul 3, 2000 6:54 pm
3524
In a message dated 7/3/00 1:54:40 PM Central Daylight Time, ... Try this ftp site: ftp://ftp.rpini.com/pub/cryptocd/source/cyphers/des/c/ While you're there,...
jpeschel2@...
Jul 3, 2000 7:16 pm
3525
Thanks to all who've posted ideas, suggestions & encouragement that have kept me going this far. 9 & 10 look like jobs for the big boys. Although I'll only...
Nigel Blower
n.blower@...
Jul 3, 2000 7:39 pm
3527
... --snip-- ... Also, it's George Borrow, not Berrow, if anyone's looking for it. Jeremy...
Jeremy Humphries
jrh@...
Jul 4, 2000 9:26 am
3528
... boys. ... Nigel, You to can join the big boys - the TCBGroupEfforStage9 is well on the way to cracking Stage 9 but wouldn't object to another member. Phil...
phil@...
Jul 4, 2000 9:31 am
3529
... <dhallepee@w...> ... I replied to this 2 days ago and don't see my post, so I'll try again: I can't believe everyone let this go without commenting on...
cmonico@...
Jul 4, 2000 11:21 am
3530
... You're welcome ;-) Regards, Dave...
Dave Smith
dlsmith@...
Jul 4, 2000 2:33 pm
3531
Just finished s6, sure hope that s7 is easier. (don't tell me) Anyway I have to drop of the list for awhile , but I'll be back. Good Luck to you all, and...
Bill Patterson
bcpat@...
Jul 4, 2000 11:19 pm
3532
Hi Mike, Your Patterns 3,333,331 33,333,331 Are just a subset of the generic (6n)+-1 Every prime above 3 will be either one above or one below a number that...
Bob Miller
bob.miller@...
Jul 5, 2000 4:24 am
3533
... Let me know if you still need one. I've an example using Eric A. Young's DES library (libdes), which is easy enough to implement. (Which I used to decode...
Fred Limouzin
fphenix@...
Jul 5, 2000 5:00 pm
3534
Hi Fred I wouldn't mind a copy of your program if you could mail it to me (is in C or C++ ?) - Is usage strraightforward? Thanks Michael ... Let me know if you...
michael lilley
mlilley@...
Jul 5, 2000 6:14 pm
3535
I need some help. I've tried cracking stage 6 for a day now and nothing helped. I then turned to the "hints" people have writting. That didn't help either. I...
Anders Rosendal
qute@...
Jul 5, 2000 8:58 pm
3536
Nimen Hao. Hello everyone. Questions about s3 first, but lower down s9 and s10. So I'm new to this cipherchallenge and deciphered 1,2 and 4 swiftly by hand....
Damian
damiangreef@...
Jul 5, 2000 9:55 pm
3538
In a message dated 7/5/00 6:22:00 PM Central Daylight Time, damiangreef@... writes: << Have now used excite search engine and think identified writer...
lobert@...
Jul 5, 2000 11:28 pm
3539
libDES is also available on line. Do a Google search, and you'll find it. John Lobert...
lobert@...
Jul 5, 2000 11:37 pm
3540
... Factoring composite numbers containing small primes is relatively trivial, but when those primes are 60+ decimal digits each, the going gets a little ...
Gish, David
gish@...
Jul 6, 2000 12:16 am
3541
Hello everyone, Thanks to John Lobert for pointing me to google. I guess I'll go use that. Thanks to David Gish as well. I've deleted my original additional. ...
Damian
damiangreef@...
Jul 6, 2000 12:35 am
3542
LIBDES.EXE has been posted in the files area all along. Its usage is self-explanatory. ... From: michael lilley <mlilley@...> To:...
Richard Kaplan
kaplan@...
Jul 6, 2000 3:02 am
3543
There was mention of free C compilers a while back. Could someone give me the URL for one of the good ones please? Cheers. ... "Thomas "B*witched, B*very...
Thomas A Martin
tosk_p10@...
Jul 6, 2000 1:29 pm
3544
Hello Thomas The following web pages have free "C" compilers. Free Borland C++Builder http://www.borland.com/bcppbuilder/freecompiler Borland's Museum You can...
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