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Forum: 15k Search

2005-04-11, 17:06

Replies: 13

The fastest way to a top-5000 prime?

Views: 14,068

Posted By lsoule

Thanks for the info smh and TTn. I'll take a...

Thanks for the info smh and TTn. I'll take a look at fixed-n sieving.

Now that I've tried out some of the k's in my table, I have another question.
Some k's like 8331405 have 14 primes in the...

Forum: 15k Search

2005-04-02, 21:38

Replies: 13

The fastest way to a top-5000 prime?

Views: 14,068

Posted By lsoule

Just for the sake of completeness, I've updated...

Just for the sake of completeness, I've updated the table this time
searching for all primes with n>100k. My previous list just searched
for primes currently on the top-5000 list...

...

Forum: 15k Search

2005-03-17, 03:10

Replies: 13

The fastest way to a top-5000 prime?

Views: 14,068

Posted By lsoule

No problem taking 25935. The only other one I'm...

No problem taking 25935. The only other one I'm trying out is 6555.

Forum: 15k Search

2005-03-16, 14:50

Replies: 13

The fastest way to a top-5000 prime?

Views: 14,068

Posted By lsoule

This one found 5 prime from n=183-221k. Based on...

This one found 5 prime from n=183-221k. Based on the estimates
above, I only expected one prime, but happily surprised:
8331405*2^207555-1
8331405*2^205885-1
8331405*2^199127-1...

Forum: 15k Search

2005-03-15, 19:53

Replies: 13

The fastest way to a top-5000 prime?

Views: 14,068

Posted By lsoule

The fastest way to a top-5000 prime?

I’ve been searching for primes of the form k*2^n-1 with the 15k project for a while now and became interested in finding candidates, k, that would produce a top-5000 prime the fastest. How long it...

Showing results 1 to 5 of 5

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