I'll second that! Seems like we are overdue...
Type: Posts; User: philmoore
I'll second that! Seems like we are overdue...
Just responding to Zuzu's thread: I redid the calculations from our INTEGERS paper and find that we had only a 0.55% chance of solving the dual Sierpinski problem by n=9092392, so we were incredibly...
The most likely kind of error would be for a test to report "composite" but to submit an incorrect residue. Such an error would never be detected until another test reports a different residue. The...
That is good news for the project, that all of the "secret" tests have been in agreement. It at least puts some sort of upper bound on the error rate. I'm going to vote "no", I think that the...
I haven't voted because it seems to me that it would be more valuable for the project to get some data on error rates first. If 1% of the tests are in error, the chance that we have missed a prime...
It would be interesting to see your statistics on error rates, Louie. Wblipp pointed out that this information could be incorporated into a resources allocation model. My guess is that the...
Just a few questions in regard to the post of Jimmars:
quote:
What scares me is that people that are aganist the war want the U.S. too be a second rate nation that begs the U.N. to defend us.
...
Yes, Louie can make all the fun he wants over people discussing politics, but please leave retarded people out of it!
A couple of points about Moo's post - Bush said just three days ago that the...
I forgot to give you your homework assignment: Prove that 271,129 is also a Sierpinski number.
Here's a condensed version of the proof that 78557 is a Sierpinski number. n = a mod b means that (n-a) is divisible by b, or that dividing n by b leaves a remainder of a.
If n = 0 mod 2,...
You read correctly, this new largest known Proth prime, 3*2^2,145,353 + 1, at 648,817 decimal digits was discovered on February 21st and has pushed M34 down to 7th place. The new discovery is a...
I see Nuutti just posted this to the primes list:
http://groups.yahoo.com/group/primenumbers/message/11554
A new largest known Proth and non-Mersenne prime, 3*2145353+1, at 645817 digits, a factor...
Smh is correct, of course, there is no need to sieve the numbers below 1M very deeply. However, since the range 1M-3M was sieved less than optimally (with current software unavailable at that time),...
Nuutti said:
> I think that sieving in the range 3,000,000 -> 20,000,000 should have priority right now, but when we have reached 10T we should consider double check sieving.
I think it isn't...
Thanks!
That's fantastic! I have an EXCEL spreadsheet that charts the progress so far, but I don't know how to attach it to this posting. Can anyone help me figure out how to include it? Thanks.
Good question! One would expect the higher Proth weight k's to go first, but 46157 and 65567 don't fit that expectation. I'm sure that others must have wondered the same thing.
By the way, you...
Yes, indeed, sieving is less efficient on this number. The "Proth weight" (or equivalent "Nash weight") measures how efficient sieving is on a particular k. From another thread, the Proth weights...
Predictions are often wrong. Like mine on the thread:
http://www.free-dc.org/forum/showthread.php?s=&threadid=2268
Looks like many of us were over-optimistic on that poll! Still, these sorts of...
Hi Phil,
I *still* can't post to the SoB forum, but I have been reading it. With
respect to the observations of k.2^n+1 modulo small primes:
"Paul Jobling could tell us for sure, but I doubt...
Play this same game with k=78557:
n = 0 mod 2: 78557*2^n+1 is divisible by 3.
n = 1 mod 4: 78557*2^n+1 is divisible by 5.
n = 7 mod 12: 78557*2^n+1 is divisible by 7.
n = 11 mod 12: 78557*2^n+1...
That's great news from Louie about the new sieve! My only reservation is that a sieving range of n from 3 million to 5 million seems a little conservative. We ran through all the exponents from 1...
Sorry, I meant MB when I said GBytes! But the input file would be the same for all sievers, since they would all be sieving the same range of n values.
I agree with ceselb, even though the list of numbers not yet eliminated by the sieve would be large, it would not have to be downloaded very often, and it seems that so far, the number of people...
Soon. I would guess before the end of January at the latest! I also will make a prediction, that SoB finds the third largest known prime some time this year, unless GIMPS discovers another Mersenne...