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Old 2019-01-15, 14:46   #133
robert44444uk
 
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Quote:
Originally Posted by Bobby Jacobs View Post
I am excited to continue the prime gap search above 264. I really want to know what the next few maximal prime gaps are. When are we going to do it?
When someone can program it to be efficient!

There are various programs on PGS that can do it, but they operate over 100 times less efficiently that Robert Gerbicz's code which worked only up to 2^64

I am not aware of anyone who is currently looking in the area above and close to 2^64.

I'm currently looking at defined offsets from multiples of primorials in the gap length 2000 to 8000 range.

Last fiddled with by robert44444uk on 2019-01-15 at 14:55
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Old 2019-02-23, 20:27   #134
Bobby Jacobs
 
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Where is the code for finding gaps above 264? Can I please take a look?
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Old 2019-05-01, 12:53   #135
Bobby Jacobs
 
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We could find the next maximal twin prime gap. That seems to be what people are doing now.
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Old 2019-05-01, 15:58   #136
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We could find the next maximal twin prime gap. That seems to be what people are doing now.
I expect to find 10 in the next week!
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Old 2019-05-01, 17:50   #137
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[wrong post]

Last fiddled with by rudy235 on 2019-05-01 at 17:52 Reason: mistaken post
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Old 2019-12-08, 22:37   #138
Bobby Jacobs
 
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The newest prime gap project is putting Dr. Nicely's gaps on this site.
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Old 2019-12-19, 01:11   #139
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Quote:
Originally Posted by robert44444uk View Post
When someone can program it to be efficient!

There are various programs on PGS that can do it, but they operate over 100 times less efficiently that Robert Gerbicz's code which worked only up to 2^64

I am not aware of anyone who is currently looking in the area above and close to 2^64.

I'm currently looking at defined offsets from multiples of primorials in the gap length 2000 to 8000 range.
Greetings. This is something I thought about after I began running Prime95 back in 2005. I have been a hobby programmer since 1988 after I started at a local community college. I tried writing some of my own code. This was greatly restricted in size at the time. Running 2^45 was about all I could do.

I have something different now which has a big-integer library. I wrote a short test and had it display 2^1200 in decimal. In just a key press, the screen was full.

More recently, I wrote my own program to do gap searches. It has been an ongoing project performing tests, and more tests. Is it capable of going beyond 2^64? Most definitely. Is it efficient? Probably not. I have no understanding of advanced math, so I did this in such a way that I could understand what I was doing. This is where any inefficiency would begin. For someone 64 years old, I do the best I can.
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Old 2020-09-24, 22:44   #140
Bobby Jacobs
 
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What is the next prime gap project now?
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Old 2020-09-25, 12:45   #141
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Bobby, please stop doing that.

Anyway, while we're at it...
@ ATH: I'd still be interested to know a bit more about your calculation above 264 here: https://www.mersenneforum.org/showpo...0&postcount=69
Calculation time or throughput / specs of the PC / availability/distributability (is that a word?) of the program?
Some people might be interested in taking the calculation further, even if it's rather inefficient...
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