Riesel base 16 - team drive #2

[MyDogBuster]

Taking 150K - 154K

[mdettweiler]

Originally Posted by MyDogBuster

Taking 150K - 154K

Great! We could really use a boost on this drive right about now--thanks for helping out.

BTW, you know how over in the Sierp. base 3 thread we were talking about having to prove the primes with PFGW? Well, just wanted to let you know that since base 16 is a power of 2, LLR can do a regular old LLR test like it does with base 2 numbers, and thus all primes are automatically a final proof. No need to re-prove them with PFGW.

[MyDogBuster]

Well, just wanted to let you know that since base 16 is a power of 2, LLR can do a regular old LLR test like it does with base 2 numbers, and thus all primes are automatically a final proof. No need to re-prove them with PFGW.

Thanks Max, All these nuggets of help will get me up to speed. I was wondering why LLR was doing base 2 tests.

[Flatlander]

Taking:
154K-156K

[gd_barnes]

FINALLY, Riesel base 16 scores one!:

1478*16^147920-1 is prime

submitted as:
739*2^591681-1

An interesting side note on this one: The CRUS project beat the NPLB project by < 1-2 weeks to this prime. NPLB will hit n>590K for all k=400-1001 within the next 1-2 weeks. I'll have it to show it as a known prime there now.

I hate it when the 2 projects compete with one another. lol

Riesel base 16 is now complete to n=148K. n=148K-150K is running now and should complete in ~2-3 days.

BTW, if anyone wants to remove k=1478 from their sieved file, they can. Personally, I like to leave them in there if it's in top-5000 territory and I'm already running a file for the higher n-range. Sometimes you might get a 2nd top-5000 prime for the same k. Regardless, I'll remove the k from the currently posted files here in a little while.

Edit: This also knocks out one for Riesel base 256: 1478*256^73960-1


Gary

[henryzz]

Originally Posted by gd_barnes

FINALLY, Riesel base 16 scores one!:

1478*16^147920-1 is prime

submitted as:
739*2^591681-1

An interesting side note on this one: The CRUS project beat the NPLB project by < 1-2 weeks to this prime. NPLB will hit n>590K for all k=400-1001 within the next 1-2 weeks. I'll have it to show it as a known prime there now.

I hate it when the 2 projects compete with one another. lol

Riesel base 16 is now complete to n=148K. n=148K-150K is running now and should complete in ~2-3 days.

BTW, if anyone wants to remove k=1478 from their sieved file, they can. Personally, I like to leave them in there if it's in top-5000 territory and I'm already running a file for the higher n-range. Sometimes you might get a 2nd top-5000 prime for the same k. Regardless, I'll remove the k from the currently posted files here in a little while.

Edit: This also knocks out one for Riesel base 256: 1478*256^73960-1


Gary

have you been checking NLPB primes to see if they knock out a CRUS k

[gd_barnes]

Originally Posted by henryzz

have you been checking NLPB primes to see if they knock out a CRUS k

Yep. It's very few and far between. Almost all of the k's that we are searching for Riesel bases that are powers of 2 are > 1001 and so don't apply.

k=1478, which happens to convert to k=739 base 2, for Riesel base 16 and 256 was a rare exception.

[MyDogBuster]

Taking 156K - 160K

[Flatlander]

154K-156K
is complete.

[MyDogBuster]

Taking 160K - 166K

[MyDogBuster]

150K - 154K Complete no primes

results emailed