[QUOTE=henryzz;261874]I think I will do that. A test at 190M took 145 seconds which would imply a sieve depth of ~1.5T. Any hints on what depth 250k-500k will then be sieved to. What depth if 1 or 2ks are removed? It might be possible to be worked out now based on how many primes in 100k-250k but you should be able to make an educated guess much easier I think. A test at 400k takes 655 seconds.[/QUOTE]

No very accurate hints. It can vary greatly depending on how many k's are found prime for the lower n-range. If optimum sieving for n=100K-250K is 1.5T, for n=250K-500K it might be 3-4T or 8T-10T. I remember one base where I hardly had to sieve the higher range at all because the lower range had so many primes. It's usually between 2 and 8 times the lower n-range depth if the initial n-max to n-min ratio is in the 4 to 5 range, i.e. here 500K / 100K = 5.

BTW, on several occassions you've used "M" in place of "k" for the search depth. Just thought I'd point that out.

[QUOTE=gd_barnes;261875]No very accurate hints. It can vary greatly depending on how many k's are found prime for the lower n-range. If optimum sieving for n=100K-250K is 1.5T, for n=250K-500K it might be 3-4T or 8T-10T. I remember one base where I hardly had to sieve the higher range at all because the lower range had so many primes. It's usually between 2 and 8 times the lower n-range depth if the initial n-max to n-min ratio is in the 4 to 5 range, i.e. here 500K / 100K = 5.[/QUOTE]
Thanks for the info. The possible 8T-10T search depth is the reason this helps a lot of the time. Hopefully I will find primes making it 3-4T.

[QUOTE=gd_barnes;261875]BTW, on several occassions you've used "M" in place of "k" for the search depth. Just thought I'd point that out.[/QUOTE]
Whoops! Obviously k was meant. I will watch out for this in the future.

Just noticed that k=200M-250M at n=100k has 84 ks compared to 224ks. That indicates multiplying n by 4 leaves 37.5% of ks remaining. I am multiplying n by 5 but they are also probably lower weight ks so it sounds like I should find 3-4 primes. I had expected 1-2 priimes so more will be welcome if they appear.

Sieving is complete upto 1.5T. I will load 100k-250k into a personal prpnet server.

[QUOTE=henryzz;262804]Sieving is complete upto 1.5T. I will load 100k-250k into a personal prpnet server.[/QUOTE]
I have reached 200k so far with no primes.

[QUOTE=henryzz;263789]I have reached 200k so far with no primes.[/QUOTE]
I have reached n=232k.
5309716*3^231434-1 is prime

[QUOTE=henryzz;264768]I have reached n=232k.
5309716*3^231434-1 is prime[/QUOTE]
Now complete to 250k. Continuing after more sieving.
Another new prime:
7985602*3^243614-1
Results emailed

Another prime 7328954*3^250101-1
That means 3 primes within 20k.

[QUOTE=henryzz;266514]Another prime 7328954*3^250101-1
That means 3 primes within 20k.[/QUOTE]

Wow and only 4 k's remain for k<10M for R3. Nice! :smile:

[QUOTE=gd_barnes;266570]Wow and only 4 k's remain for k<10M for R3. Nice! :smile:[/QUOTE]
And the prime run continues:
5318998*3^267482-1 is prime

k=250M-300M has been released due to lack of activity or response to PMs/Email.