1620-1621 complete, no primes.

1662-1670 no primes :sad:

kracker,

About your smilie. Let me teach you one thing I learned. You need a lot of patience to find primes and what I usually think when I reserve a range, rather than always expecting a prime, is to help RPS to clean the low boundaries of k<300 (check here [url]http://www.15k.org/riesellist.html[/url]). This means that I am always concerned when the range will be completed than expecting a prime. In this way I won't get frustrated.
Finally primes will appear when you least expect, as often occurs with me.

Happy hunting!

Carlos

1590-1591
no prime

1591-1592 no prime

Meanwhile, if noticed, the files are on the server in chunks of 2k up to 1800.

[QUOTE=pinhodecarlos;373155]kracker,

About your smilie. Let me teach you one thing I learned. You need a lot of patience to find primes and what I usually think when I reserve a range, rather than always expecting a prime, is to help RPS to clean the low boundaries of k<300 (check here [url]http://www.15k.org/riesellist.html[/url]). This means that I am always concerned when the range will be completed than expecting a prime. In this way I won't get frustrated.
Finally primes will appear when you least expect, as often occurs with me.

Happy hunting!

Carlos[/QUOTE]

Sorry, semi-wrong smilie. :smile: I'm not in it only for finding primes, I was just curious if I was normal and how common or rare primes were in this range.

[QUOTE=kracker;373160]Sorry, semi-wrong smilie. :smile: I'm not in it only for finding primes, I was just curious if I was normal and how common or rare primes were in this range.[/QUOTE]

There are definitely estimates available to find number of candidates per prime over the long run, provided exponent and sieve depth. Rather than bother with such calculations, refer to post 1 of any team drive and have a peek at how many primes have been recently found. On this drive, it appears we've had 4 primes in the last 100k n-range. This rate is inversely proportional to the exponent, but for current tests it suggests 1 prime per 25k is a reasonable guess for how common primes are. Of course, individual results are in no way regular- 2 primes in a 5k block or 60k without a prime are both entirely reasonable.

I'd provide you the formula for tests per [expected] prime, but I don't have it handy and I'm lazy.

Taking 1680-1684.

[QUOTE=VBCurtis;373172]There are definitely estimates available to find number of candidates per prime over the long run, provided exponent and sieve depth. Rather than bother with such calculations, refer to post 1 of any team drive and have a peek at how many primes have been recently found. On this drive, it appears we've had 4 primes in the last 100k n-range. This rate is inversely proportional to the exponent, but for current tests it suggests 1 prime per 25k is a reasonable guess for how common primes are. Of course, individual results are in no way regular- 2 primes in a 5k block or 60k without a prime are both entirely reasonable.

I'd provide you the formula for tests per [expected] prime, but I don't have it handy and I'm lazy.[/QUOTE]

Thanks :smile:

1670-1680 done. No primes