Hi Chris, and welcome to primeform :) ... file. ... Primeform's file mode is designed to be familiar to anyone who has previously used proth.exe. The only...
832
Paul Jobling
Paul.Jobling@...
Jul 3, 2000 8:42 am
Hi all, A few weeks ago, Giovanni La Barbera used Certifix to find the second smallest titanic. Shortly after that, Jack Brennen and Giovanni collaborated to...
833
Giovanni La Barbera
giolaba@...
Jul 3, 2000 4:31 pm
Hi to you all, 10^999+2222239 and 2*(10^999+2222239)+1 are prime. This is the smallest titanic Sophie Germain couple (1000 digits) (all smaller 1000 digits...
834
Chris Nash
chris_nash@...
Jul 4, 2000 6:38 am
... Congratulations to Paul on this discovery, and indeed this new prime 3- tuple record - not bad for a week's work, I think Paul seems to be breaking record...
835
Chris Nash
chris_nash@...
Jul 4, 2000 8:58 am
Hi folks, After moving PrimeForm into the right category on eGroups Science/Math/Number_Theory/Prime_Numbers/Primality_Proving I've now added a link in the...
836
Phil Carmody
fatphil@...
Jul 4, 2000 10:40 am
... http://www.denhulster.nl/primeform/deffac.html I'll throw my hands in the air and own up to coming up with a grand perl-scripting scheme for maintainance...
837
Giovanni La Barbera
giolaba@...
Jul 6, 2000 6:49 am
... Subject: half titanic couple (?) Hi to you all, Using CERIFIX 0.5 we have performed the certification of (10^999+1043119-1)/2 (999 digits with a Pentium...
838
Phil Carmody
fatphil@...
Jul 6, 2000 12:18 pm
... Let's not go overboard with excitement. You're only as young as the man that you feel - Mae West You're only as straight as the man that you feel - Dr R...
839
Chris Nash
chris_nash@...
Jul 6, 2000 8:40 pm
... Congratulations to Giovanni and Marco yet again on establishing yet another "smallest of the biggest" proof. It seems with Certifix there is definitely...
840
Chris and Katie
frederick3@...
Jul 7, 2000 6:10 am
Is there any way to prove primality on a number of the form ((p-k)*k)+1 where p is a prime number? I can't get it to. Can it be done? CAF [Non-text portions...
841
Chris Nash
chris_nash@...
Jul 8, 2000 1:14 am
Hi there Chris F ... If p is quite large, the answer is unfortunately "probably not". PrimeForm implements tests where "N^x-1" can be factored, in the current...
842
Chris Nash
chris_nash@...
Jul 11, 2000 10:14 pm
Hi folks, I've finally gone ahead and registered the domain name 'primeform.net'. (Interestingly enough, www.primeform.com is currently held by an domain name...
843
Andy Steward
aads@...
Jul 11, 2000 10:53 pm
DearAll, ... bodybuilders. I imagine the ... ... or dead-lifter or bench-presser. Sorry. Very sorry. Andy (635lb dead lift in my prime)...
844
Chris Nash
chris_nash@...
Jul 11, 2000 11:16 pm
Hi folks ... I should have said "alleged squatter", I know. Perhaps the registrant of primeform.com does have a legitimate interest in bodybuilding products....
845
Michael Bell
michael@...
Jul 12, 2000 8:37 pm
Hi everyone, I've just uploaded APSieve to the file area. This will sieve for (almost) any Arithmetic progression of primes, that is any form that can be...
846
Chris Nash
chris_nash@...
Jul 12, 2000 10:40 pm
Thanks for the upload Michael, I'm looking forward to trying this one out :) ... required to ... have to ... As Michael says, I added some more command-line...
847
Dirk Augustin
augustd@...
Jul 14, 2000 11:40 am
With the great combination of NewPGen 2.1 (sieving), PrimeForm/GW (probable primality testing) and the "old" Primeform for the full primality tests I have...
848
Phil Carmody
fatphil@...
Jul 14, 2000 12:07 pm
... Very impressive. What is the expected density of these forms? (e.g. how far would one have to take k before the next bi-twin chain would be found, keeping...
849
Paul Jobling
Paul.Jobling@...
Jul 14, 2000 12:23 pm
... A BOFP calculations says that the first was found at about the right place - the odds are about 1 in 947 million per k. The second seems to be a luckier...
850
Dirk Augustin
augustd@...
Jul 14, 2000 12:33 pm
... I am not completely sure, but I think the following k-Tuple conjecture should also work for BiTwins. If n# has d decimal digits, then for a CC of length L...
851
Chris Nash
chris_nash@...
Jul 16, 2000 1:41 am
Congratulations to Dirk on his new BiTwin records! ... conjecture should ... sieve up to ... In theory, it is a little bit different than that, although how...
852
Michael Bell
michael@...
Jul 17, 2000 7:23 pm
Hi, New update to APSieve (sieve for k.n+/-b). I have decreased the memory usage of APSieve. This allows larger k ranges, and also seems to increase the...
853
Chris Nash
chris_nash@...
Jul 17, 2000 11:04 pm
Hi folks ... memory ... increase ... Sounds great. I have to also do some optimization of the pfgw factorer. For instance if you are looking for k.10000!+b, it...
854
Michael Bell
michael@...
Jul 18, 2000 10:14 pm
Hi all, ... This isn't really a major problem - it only ever does it once per sieve run. Maybe I should shift it so that it calls pfgw after giving the rest of...
855
Jim Fougeron
jfoug@...
Jul 19, 2000 4:02 am
Chris, Would it be possible to add to the expression parser some way of asserting that a "sub" expression is prime, so that primality proving can be performed....
856
Chris Caldwell
caldwell@...
Jul 19, 2000 1:12 pm
... Rather than alter the parser, perhaps a file (or list) of factor hints could be used? (In act, one of primality prover I wrote in UBASIC, when it trial...
857
Chris Nash
chris_nash@...
Jul 19, 2000 6:56 pm
Hi folks, It seems that eGroups is having one of its moments of fun again, and sending replies before the messages that start the thread :) Many thanks to...
858
Paul Jobling
Paul.Jobling@...
Aug 3, 2000 4:30 pm
Hi all, Just a quick note to let you know that Dirk Augustin and I have been performing a search to find a titanic Cunningham chain of the first kind of length...
859
Chris Nash
chris_nash@...
Aug 4, 2000 1:23 am
Hi folks ... kind of ... containing ... number of ... Yet again, congratulations to Dirk and Paul on this stunning record.... titanics far exceeds...
860
Dirk Augustin
augustd@...
Aug 5, 2000 4:53 pm
With the help of the programs NewPGen, Primeform/GW and the "old" Primeform I have discovered the first Bitwin with 2 links that has more than 200 digits. The...
