I found today the 43-th value for the OEIS sequence A098845 2^633888-2^316944-1 is prime with 190820 digits I use a 3Ghz processor to found this last value in...
... Pierre, have you tried out the 3 P's Suite's "tripe"? http://primes.utm.edu/bios/page.php?id=953 It might save you a lot of computation. Anyway, well done!...
Congrats pierre, Its good to know that we are still looking for CAROL and KYNEA numbers. I just found out that my computer spit out a Carol PRP. I will test...
... numbers. I just found out that my computer spit out a Carol PRP. I will test today and report. It is smaller that this one. And based on my conjecture...
... numbers. I just found out that my computer spit out a Carol PRP. I will test today and report. It is smaller that this one. And based on my conjecture...
Sorry, I did the math and realized that it was 2n and n, but it never registered that it was not Carol. You see, there are so many close forms..... In any...
... At least the principals (MooooMoo and Rytis) are now discussing this: http://www.primegrid.com/orig/forum_thread.php?id=569&nowrap=true#5562 Let's hope...
Hello, Group. for reference... Proth number(1878): p= k*(2^n)+1, k odd < 2^n, why is k odd ??? for some a... p is prime iff a^((p-1)/2)== -1 (mod p). my...
... What is "p"? Where is "a" used? Anyway N=19*43*193*10513==1657700353==50589*2^15+1 is a counterexample to this conjecture. Your conditions are met with...
... Good! ... An "ought" is not an "is"! What is the peculiar psychological need that makes you "want to believe" this? You have (like Paul U) chosen a PSP...
... Is x*(x^2-1)^a-1 always irreducible over the rationals? Despite the complete lack of x-PRP composites by computation ... Do there exist any solutions to...
... Congrats to Cletus for (2^253987 - 1)^2 - 2 reported on another list. I noted that it is not yet posted with Chris: http://primes.utm.edu/primes/status.php...
I tried to post. I don't remember my username and/or password...could someone please send a post?... ... Congrats to Cletus for (2^253987 - 1)^2 - 2 reported...
Hi, I would like to find twin primes near 10^n with PFGW. I can program sequence A124001 in Pari like this: for(n=1,30,k=1;while(!isprime(10^n+k) || !isprime ...
... Call this file "twin10.txt": SCRIPT DIM nn,0 DIM xx DIM yy DIM ii DIM jj OPENFILEAPP out,twinout LABEL loopnn SET nn,nn+1 IF nn>30 THEN STOP SET xx,10^nn+1...
... Here, you may simply use this ABC2 file: ABC2 10^30+$a & 10^30+$a+2 a: from 1 to 20000 step 2 and search for "Complete" in pfgw.log: grep -B2 Complete...
Hi, by "Search by form" (2^n+1)^4-2 on http://www.primenumbers.net/prptop/prptop.php these PRPs are given: 7 (2^148330+1)^4-2 178608 Cletus Emmanuel 12/2003 ...
... Not by KP (at 30%), as I recall, from looking a while ago. CHG (at 26.??%) might now be possible, if someone would like to try to get the extra 1.??%. I...
... Phi(25288,2)/75134546450271529304517298097 Phi(75864,2)/(151729*9255409*33531889*88866556599564097) Actually 26.282%, with a touch of ECM on the big...
... For the information of CHG freaks, here is how it would slice: http://physics.open.ac.uk/~dbroadhu/cert/c37933_share.txt to be compared with the epic (and...
... How about doing some actual work Paul, instead of just asking obvious questions :-? Note that you can use Aurif for cofactors 2^8826+1. We await your...
But (2^8827+1)^4 - 2 was proven prime by David already. I think that it will be good challenges if we (you - plural) were to embark on trying to prove these...
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