That would be cool. Fire away if you have time.

If some calculus can be offered up by Tim or others, it might not be necessary. Even with the calculus, I'd have to figure out how to make the spreadsheet make it work.

BTW, I edited my posted for the last 2 paras., likely after you read it. You might check it out. The last point was related to the conclusion you came up with.

[QUOTE]My initial estimate of n=10M was undoubtedly too low anyway. I was throwing out a SWAG and should have done a little more analysis to start with. It likely should have been more like n=25M-30M. But now with just 1 prime for n=150K-418K, I think it will be more like n=60M-100M, possibly higher.[/QUOTE]
:cry::cry::cry::cry::cry:

Oh well. I suppose if something is impossible for me to achieve it doesn't matter [I]how [/I]impossible. Would be nice to find a huge CRUS prime though.

418-428 is complete.

Hang on. How does "just 1 prime n=150k-418k" make a difference to the position of the final prime? To me, that's like 'I've only thrown 2 heads in the last ten throws, therefore ... ". So if 2 primes are found below 500k, say, then the n for the final k will be lower? Where am I misunderstanding. :smile:

[quote=Flatlander;190929] Hang on. How does "just 1 prime n=150k-418k" make a difference to the position of the final prime? To me, that's like 'I've only thrown 2 heads in the last ten throws, therefore ... ". So if 2 primes are found below 500k, say, then the n for the final k will be lower? Where am I misunderstanding. :smile:[/quote]
Here's an extreme example to help you understand: let's say there are 10 k's, and you expect to find a prime for all of them below 1M. Then let's say that you search up to 999K and find no primes. Don't you now need to greatly readjust your expectation of when you'll finish? In the same way, if we expected more than one prime in 150k-418k, then only found 1 in that range, (especially so if the 1 was found for the highest-weight k; not sure if that one was, just saying) then we need to readjust our expectations with the new data.

Of course, in reality, each of these k's has its first prime at some definite n, (unless one or more is really a base 6 Riesel number) and once we reach that n we will find it. So no, searching n=150k-418k and only finding one prime doesn't 'move' the position of the final n. But without having prior knowledge of what that n is, it's nicely modeled as being random. And by that, finding fewer than expected does move where you'd expect the final n to be.

It's not really like the coin-flipping example you gave. It's more like flipping a heavily-weighted coin (one for each k) until it hits a heads, then eliminating that coin. If the coin is weighted 1000:1 (or should it be 999:1? I think you know what I mean) to hit tails, then you'd expect that in 1000 flips you'd get 1 heads. Whether you've flipped 0, 1000, or 2000 tails before it, you still expect that within the next 1000 flips you'll hit 1 heads. The only difference is the total number of flips before you expect to hit 1 heads is 1000, 2000, or 3000 depending on the previous number of tails.

Thanks. It's gradually sinking in. lol

Taking 438-448.[QUOTE]Please reserve a range that will take no longer than ~5-7 days.[/QUOTE]Things will start to take a bit longer soon.

I'll change that to ~2 weeks. I keep it lower while the n-ranges are lower and the demand is great with many searchers. Feel free to take a bigger piece now if you want.

428-438 is complete.

Taking 448-464.

438-448 is complete.

Taking 464-482.

Prime!
 

78959*6^45xxxx-1 is 3-PRP.
Confirmation will take a few hours.

At >350k digits this is my and CRUS's biggest ever.

:george::george::george::george::george::george::george::george::george:

[quote=Flatlander;191737]78959*6^45xxxx-1 is 3-PRP.
Confirmation will take a few hours.

At >350k digits this is my and CRUS's biggest ever.

:george::george::george::george::george::george::george::george::george:[/quote]

Congrats :smile:

That was i nice one...

Lennart

Thanks for all the sieving Lennart. :smile:
I would have probably got bored by now if you hadn't lightened the load by taking 3 ks to 500k. But that's not much consolation to you. :sad:

Taking 482-500, then.