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Search: Posts Made By: rob147147
Forum: Software 2020-04-24, 20:44
Replies: 273
Views: 27,003
Posted By rob147147
Do you have any benchmarks and a sieve file for...

Do you have any benchmarks and a sieve file for this that I can test on my CUDA code? I've been wanting for some time to try to integrate my CUDA port of sr2sieve into mtsieve, but time has been my...
Forum: Conjectures 'R Us 2020-04-02, 11:50
Replies: 3,682
Views: 215,311
Posted By rob147147
R745 Update

Just a quick check-in from me. R745 is now at 300k, and 19 k-values remain.
Extending to n=325k now, which is 20,163 tasks. ETA is the end of 2020.
Forum: Conjectures 'R Us 2020-03-03, 09:32
Replies: 845
Views: 61,197
Posted By rob147147
R745

19 k-values now remain for R745:

26036*745^279261-1 (https://primes.utm.edu/primes/page.php?id=130715) is prime! (802086 digits)
Forum: Conjectures 'R Us 2019-11-22, 16:45
Replies: 3,682
Views: 215,311
Posted By rob147147
The prime found is in the top 5000 thread - it...

The prime found is in the top 5000 thread - it was 11138*745^297992-1
I'm currently searching 'by k' on my prpnet server, so the k-values below 11138 are all tested to n=300k with no prime,11138 has...
Forum: Conjectures 'R Us 2019-11-10, 23:01
Replies: 845
Views: 61,197
Posted By rob147147
R745

20 k-values now remain for R745:

11138*745^297992-1 (https://primes.utm.edu/primes/page.php?id=130098) is prime! (855884 digits)
Forum: Conjectures 'R Us 2019-11-10, 22:59
Replies: 3,682
Views: 215,311
Posted By rob147147
R745

I should apologise, I have not checked in with a status update for some time, and I notice today that my reservation on R745 has been removed.

I'm still working on this (and hence would like to...
Forum: Software 2019-05-03, 19:28
Replies: 273
Views: 27,003
Posted By rob147147
I've been working on my own implementation of a...

I've been working on my own implementation of a CUDA version of sr2sieve for some time. Its still very much a work in progress (it only sieves the -1 side atm, so k*b^n-1, and only prints factors to...
Forum: Software 2019-05-03, 15:56
Replies: 273
Views: 27,003
Posted By rob147147
I use the cache options -c/-C of sr2sieve almost...

I use the cache options -c/-C of sr2sieve almost all the time as it generally provides good speedups. I have also found -Q useful when building/testing my CUDA version of sr2sieve, and sometimes you...
Forum: Conjectures 'R Us 2018-08-05, 10:49
Replies: 3,682
Views: 215,311
Posted By rob147147
R745

R745 is complete to n=250k. No new primes, so 21 k's still remain.

The current plan is to continue up to n=300k, and hope for rather more luck! We have a sieve file for up to n=500k which has been...
Forum: Conjectures 'R Us 2017-12-29, 23:16
Replies: 3,682
Views: 215,311
Posted By rob147147
R745

R745 complete to n=225k. 21 k values remain.
1 prime (already reported) in the range n=200k-225k :
21290*745^203998-1

Continuing to n=250k.
Forum: Conjectures 'R Us 2017-06-30, 13:37
Replies: 845
Views: 61,197
Posted By rob147147
R745

21 k's remain for R745:

21290 * 745^203998-1 (https://primes.utm.edu/primes/page.php?id=123611) (585919 digits)
Forum: Conjectures 'R Us 2017-06-30, 13:33
Replies: 3,682
Views: 215,311
Posted By rob147147
R745

R745 complete to n=200k. 22 k values remained.
Continuing to n=250k.
Forum: Conjectures 'R Us 2017-04-04, 16:04
Replies: 3,682
Views: 215,311
Posted By rob147147
R745 Update

A quick update on R745.

Just passed n=190k, still 22 k values remain.
Forum: Conjectures 'R Us 2017-01-06, 22:25
Replies: 845
Views: 61,197
Posted By rob147147
R745

Upon visiting a machine with limited internet access I discovered it had found a prime on Boxing Day, so a nice late Christmas present. Down to 22 k's remaining on R745.

24510*745^177846-1...
Forum: Conjectures 'R Us 2016-09-13, 14:10
Replies: 845
Views: 61,197
Posted By rob147147
Slow but steady progress, 23 k's remain for R745:...

Slow but steady progress, 23 k's remain for R745:

16778 *745^168179-1 (https://primes.utm.edu/primes/page.php?id=122205) (483041 digits)
Forum: Factoring 2016-07-13, 17:27
Replies: 1,804
Views: 116,983
Posted By rob147147
That's me. Send me a PM so I know what details...

That's me. Send me a PM so I know what details you need
Forum: Conjectures 'R Us 2016-06-28, 17:07
Replies: 3,682
Views: 215,311
Posted By rob147147
5 primes found from n=100k ...

5 primes found from n=100k

10218*745^101464-1
30930*745^103887-1
17772*745^115942-1
19338*745^141683-1
20588*745^158967-1

24 k's remaining
Forum: Conjectures 'R Us 2016-06-22, 13:48
Replies: 845
Views: 61,197
Posted By rob147147
These are slowly getting bigger on my R745...

These are slowly getting bigger on my R745 search:

20588 * 745^158967-1 (https://primes.utm.edu/primes/page.php?id=121816) (456583 digits)
Forum: Conjectures 'R Us 2016-06-22, 13:41
Replies: 3,682
Views: 215,311
Posted By rob147147
R745 Update

Just a quick status update on R745.

We went past the reservation of n=150k a while ago (been busy sorting the PhD thesis!), and we're now about to pass n=160k. I'll extend the reservation up to...
Forum: Conjectures 'R Us 2016-02-05, 09:26
Replies: 845
Views: 61,197
Posted By rob147147
I added one from my R745 search yesterday evening...

I added one from my R745 search yesterday evening

19338 * 745^141683-1 (https://primes.utm.edu/primes/page.php?id=121022) (406941 digits)
Forum: Conjectures 'R Us 2016-01-21, 16:04
Replies: 1,660
Views: 102,556
Posted By rob147147
R75

R75 is complete to n=250k. 3 primes were found between n=100k and n=250k:
3362*75^105670-1
3708*75^137166-1
2490*75^209649-1

Residues have been emailed, base released
Forum: Msieve 2016-01-15, 17:05
Replies: 11
Views: 2,200
Posted By rob147147
I've factored it for you anyway - it took less...

I've factored it for you anyway - it took less than 3 minutes of ECM using 2 threads
http://factordb.com/index.php?id=1100000000814812720
Forum: Conjectures 'R Us 2015-09-10, 12:36
Replies: 845
Views: 61,197
Posted By rob147147
I added one this morning: 2490 *75^209649 -...

I added one this morning:

2490 *75^209649 - 1 (https://primes.utm.edu/primes/page.php?id=120345) (393109 digits)
Forum: Conjectures 'R Us 2015-08-16, 13:14
Replies: 273
Views: 17,301
Posted By rob147147
For reference, I added 10*708^27+1 to factordb,...

For reference, I added 10*708^27+1 to factordb, and its first factor is 18960572317
Forum: Conjectures 'R Us 2015-07-31, 14:00
Replies: 1,660
Views: 102,556
Posted By rob147147
R75

Reserving R75 (100k-250k)
Showing results 1 to 25 of 62

 
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