[quote=gd_barnes;139481]Oh, wow! Congrats on a nice pair! If I had to guess, I doubt there are 2 primes so close together for ANY n>200K for all values of k<=1001.
If you have a little time and are a little bored, see what the closest 2 nvalues together are for primes on the top5000 site where k<=1001 and n>200K.[/quote] 507*2^2175881 and 495*2^2175881 are both prime, as are 8912^261255 and 313*2^2612551. These are the closest in nvalue through n=600K (what's on the Prime Search page anyway). The next smallest n gap in the n=500K range is 25*2^5875851 and 301*2^5876351. 
[quote=MiniGeek;139488]507*2^2175881 and 495*2^2175881 are both prime, as are 8912^261255 and 313*2^2612551. These are the closest in nvalue through n=600K (what's on the Prime Search page anyway). The next smallest n gap in the n=500K range is 25*2^5875851 and 301*2^5876351.[/quote]
Interesting. So yours are the closest together for n>265K. That's remarkable for n>530K! Of course Primesearch does not have a lot of primes for k<300 and is missing some for k>300 that are reserved by others there but found by us. You'd have to use a recent k<300 page (I keep one updated at all times) or try searching the top5000 site to know for sure, which would be very time consuming. Gary 
955*2^5218911 is prime

[quote=gd_barnes;139505]Interesting. So yours are the closest together for n>265K. That's remarkable for n>530K!
Of course Primesearch does not have a lot of primes for k<300 and is missing some for k>300 that are reserved by others there but found by us. You'd have to use a recent k<300 page (I keep one updated at all times) or try searching the top5000 site to know for sure, which would be very time consuming. Gary[/quote] My first idea was to look at the top5000 site, but it has so many primes of so many forms that just limiting it to riesel base 2 k < 1002 would be difficult, not to mention it wouldn't have the full list of < #5000, which would be needed to look down to n > 200K. Here's the top of the CSV file I worked up to see the gaps: [code] 261255 0 217588 0 464001 1 458098 1 234304 1 343303 2 314000 2 307794 2 286103 2 246354 2 215859 2 357331 3 287537 3 215614 3 374455 4 278054 4 259537 4 251754 4 222606 4[/code]So, mine's not the smallest n gap n>265K, I was just pointing out the two that had identical n's. Mine's the smallest [B]ngap[/B] for n>464001, but for the smallest [B]size[/B] (# of digits and what they are) difference, you'd have to check the k values and multiply the number out and everything. But yeah, regardless of past primes, that's quite an amazingly small gap, and I'm glad I got it. :smile: 
[quote=MiniGeek;139507]
But yeah, regardless of past primes, that's quite an amazingly small gap, and I'm glad I got it. :smile:[/quote] For one of our most faithful searchers, I'm glad you got it too. I know you had some dormant reservations for quite a while. As is the nature of randomness, everything evens out in the long run. In this case, had you not chosen to take the higher nrange with all nvalues at the higher fftlen, you likely wouldn't have gotten the nice pair or 3 within just an n=600 range. Gary 
[quote=gd_barnes;139522]For one of our most faithful searchers, I'm glad you got it too. I know you had some dormant reservations for quite a while. As is the nature of randomness, everything evens out in the long run. In this case, had you not chosen to take the higher nrange with all nvalues at the higher fftlen, you likely wouldn't have gotten the nice pair or 3 within just an n=600 range.
Gary[/quote] Yep, the randomness of primes is annoying at times and so so much fun at other times (depending on how it's treating you, of course :smile:). The gap between the 3 is actually just n=120. It's part of a n=600 range I reserved, as you know and pointed out, but the distance between the first of these primes and the most recent is only 120. Well, it makes up for that mistake Anon made a while back that gipped me out of 3 primes (he didn't notice my reservation and sent a range which I partially reserved to an LLRnet server, which promptly returned 3 primes in an n=64 part of the n=100 range I should've had). Those primes were: [code]615*2^4190821 AES 451*2^4190591 AES 831*2^4190181 AES[/code]Oh well, I got a nice triplet of primes now, and they're a lot bigger! :smile: 
465*2^5221681 is confirmed prime
817*2^5222531 is prime 
user=Beyond_FreeDC
[20/08/2008 02:19:01 PM] 521*2^5224221 is prime! Time : 5697.0 sec. 
After a bit of a dry period on drive 1:
595*2^5242291 is prime 
711*2^5243871 is prime

Here's one from the lowest k in the 1st drive:
401*2^5248621 is prime 
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