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Forum: Aliquot Sequences 2021-04-21, 05:20
Replies: 40
Views: 836
Posted By Happy5214
What about the number of (for lack of a better...

What about the number of (for lack of a better term, since some terms are abundant) "decreasing regime" runs (i.e. stretches of consecutive terms under a downdriver or no 2 at all)?

PS What does...
Forum: Homework Help 2021-04-20, 07:27
Replies: 9
Views: 182
Posted By Happy5214
If you want to see a computer-assisted proof,...

If you want to see a computer-assisted proof, Metamath's version is at http://us.metamath.org/mpeuni/binom2.html. The associated program can blow up that heavily condensed proof all the way back to...
Forum: Software 2021-04-20, 07:05
Replies: 154
Views: 14,640
Posted By Happy5214
I don't have them anymore, because the assignment...

I don't have them anymore, because the assignment already finished and got uploaded to PrimeNet (no factor found). :brian-e: You got the PRP test (it was 103482079, for future reference). I'll send...
Forum: Software 2021-04-18, 23:24
Replies: 154
Views: 14,640
Posted By Happy5214
That didn't help, nor did restarting mprime...

That didn't help, nor did restarting mprime completely and resuming from there. Will mprime be able to figure out when this test is actually done, display issues aside, or do I need to restart the...
Forum: Software 2021-04-17, 21:16
Replies: 154
Views: 14,640
Posted By Happy5214
I was using build 1 of mprime 30.5. I upgraded to...

I was using build 1 of mprime 30.5. I upgraded to build 2 with the same results.
Forum: Software 2021-04-17, 08:17
Replies: 154
Views: 14,640
Posted By Happy5214
I'm running a P-1 in stage 2, and it's saying...

I'm running a P-1 in stage 2, and it's saying it's 100% complete, but it's still running and printing "100% complete" reports at the normal rate. Is there a data issue or is this a problem with the...
Forum: Software 2021-04-15, 06:49
Replies: 154
Views: 14,640
Posted By Happy5214
Because I run 3 different work types in rotation...

Because I run 3 different work types in rotation (3 PRP-CF, 1 ECM, 1 P-1).
Forum: Software 2021-04-15, 05:39
Replies: 154
Views: 14,640
Posted By Happy5214
An unrelated gripe. I have 5 workers on 8 cores...

An unrelated gripe. I have 5 workers on 8 cores on my laptop. They're never all running at the same time (I run 3 max at a time, 2 cores each). But the benchmarks still use all 5 workers on all 8...
Forum: Miscellaneous Math 2021-04-15, 05:25
Replies: 9
Views: 228
Posted By Happy5214
I found a counter-example. 1469328248071876501...

I found a counter-example. 1469328248071876501 passes your test, but is listed on this list of numbers which are strong pseudoprimes to bases 2, 3, 5, and 7 (https://oeis.org/A074773/b074773.txt).
Forum: Aliquot Sequences 2021-04-15, 05:05
Replies: 40
Views: 836
Posted By Happy5214
If you're going to do queries like that, you may...

If you're going to do queries like that, you may want to convert the data into an SQLite database (no telling how big it would be, but it would likely be bigger than the uncompressed regina_file) and...
Forum: FactorDB 2021-04-14, 07:36
Replies: 464
Views: 70,043
Posted By Happy5214
That is definitely not a Cullen number. Please...

That is definitely not a Cullen number. Please rename that category to "Proth numbers" or restrict it to numbers where k==n, the actual definition of Cullen numbers, in order to match the Woodall...
Forum: Aliquot Sequences 2021-04-13, 21:51
Replies: 1,087
Views: 90,232
Posted By Happy5214
I ran it to 2.5e8, and that's all it needed. ...

I ran it to 2.5e8, and that's all it needed.

$ time ./powerTrialFactoring 3 -x k.txt -l 250000000 -t 8 > output.txt

real 51m17.165s
user 316m13.391s
sys 0m0.268s

$ grep -F...
Forum: Software 2021-04-13, 08:40
Replies: 154
Views: 14,640
Posted By Happy5214
P95/mprime really needs a way to manually force a...

P95/mprime really needs a way to manually force a proof upload. I periodically have Wi-Fi issues on my laptop (my primary GIMPS computer), and would like a way to upload proofs (I do PRP-CF, so there...
Forum: Aliquot Sequences 2021-04-13, 07:43
Replies: 1,087
Views: 90,232
Posted By Happy5214
OK, I'll start it when I wake up Tuesday. It's...

OK, I'll start it when I wake up Tuesday. It's too late in the night tonight to start a full run, but I'll do a few partials beforehand to gauge viability.

Edit: The abundance is 0.953977 at 1e7...
Forum: Aliquot Sequences 2021-04-12, 05:33
Replies: 40
Views: 836
Posted By Happy5214
As a suggestion (without looking at the code),...

As a suggestion (without looking at the code), would it be possible to treat perfect numbers as a special case? For example, instead of the above output for 28, perhaps something like:

Enter...
Forum: Aliquot Sequences 2021-04-10, 22:15
Replies: 1,087
Views: 90,232
Posted By Happy5214
And another termination. 220^55 terminates at 59.

And another termination. 220^55 terminates at 59.
Forum: Aliquot Sequences 2021-04-10, 19:46
Replies: 1,087
Views: 90,232
Posted By Happy5214
Another merge to report: 46^65:i1037 merges...

Another merge to report:

46^65:i1037 merges with 2710248:i240
Forum: Riesel Prime Search 2021-04-10, 05:53
Replies: 409
Views: 66,745
Posted By Happy5214
The aforementioned double-check of k=14549535 for...

The aforementioned double-check of k=14549535 for n=125k-300k is complete. In addition to the known primes, the following new primes were found:
14549535*2^149070-1
14549535*2^160953-1
...
Forum: Riesel Prime Search 2021-04-06, 19:02
Replies: 409
Views: 66,745
Posted By Happy5214
Funny you mention that. I had started work on...

Funny you mention that. I had started work on that k in late February, but I had suspended work on my local PRPNet servers for a bit in March to work on the GIMPS PRP-CF-DC backlog. I have since...
Forum: Aliquot Sequences 2021-04-05, 19:24
Replies: 1,087
Views: 90,232
Posted By Happy5214
If it interests anyone, the abundance ratio at...

If it interests anyone, the abundance ratio at 1e7 was 0.921549, and the difference between the ratios at 1e6 and 1e7 (~0.04455) is very close to the difference between the ratios at 1e7 and 1e9...
Forum: Aliquot Sequences 2021-04-05, 15:14
Replies: 1,087
Views: 90,232
Posted By Happy5214
I dared, and I came up short. It took two hours...

I dared, and I came up short. It took two hours with 8 threads on my Kubuntu Focus, and it generated over 39 MB of factors. More than half of the time was spent on the sigma calculation Thanks to...
Forum: Aliquot Sequences 2021-04-04, 19:17
Replies: 1,087
Views: 90,232
Posted By Happy5214
I've posted a multi-threaded version (using...

I've posted a multi-threaded version (using pthreads, so use Linux or WSL) to that link. The same computer (Kubuntu Focus) runs the same test using 8 threads in 20.75 seconds. I'm running short on...
Forum: Aliquot Sequences 2021-04-04, 14:57
Replies: 1,087
Views: 90,232
Posted By Happy5214
The port is done. If that command is the...

The port is done. If that command is the invocation you tested, it definitely didn't just take seconds. My Kubuntu Focus ran it in 1 minute and 58 seconds. Instead of attaching it here, I'll link to...
Forum: Aliquot Sequences 2021-04-03, 22:26
Replies: 1,087
Views: 90,232
Posted By Happy5214
I am currently in the process of porting it. I...

I am currently in the process of porting it. I hope to have it done in the next couple of days.
Forum: Aliquot Sequences 2021-04-03, 18:59
Replies: 1,087
Views: 90,232
Posted By Happy5214
My attempt to get the first termination in column...

My attempt to get the first termination in column 9 of base 10 instead produced the fourth merge in that column. According to Ed's script (and verified manually in FactorDB):

10^109:i3390 merges...
Showing results 1 to 25 of 580

 
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