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Old 2008-12-12, 12:45   #386
Mini-Geek
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Quote:
Originally Posted by gd_barnes View Post
I think Karsten or Mini had done an analysis on primes the closest together for us previously. Do either of you guys happen to remember what you came up with for that?
It was me. It was after I found this lovely pair:
Code:
591*2^530223-1  Mini-Geek
565*2^530221-1  Mini-Geek
I don't recall precisely what I found, but I remember pulling data from primes beside NPLB. Looking back at the files from that, it looks like at much lower n values there were pairs in the same n (261255 and 217588, if I'm reading my old file correctly). I haven't done new analysis, but I'd assume Karsten's post above mine is correct for all Drive 1 primes.

Last fiddled with by Mini-Geek on 2008-12-12 at 12:57 Reason: added the low n's
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Old 2008-12-12, 13:23   #387
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user=Jokern3000
[2008-12-12 08:35]
861*2^599041-1 is prime! Time : 2744.0 sec.

confirmed
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Old 2008-12-13, 05:59   #388
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user=IronBits
[2008-12-12 21:14:59]
813*2^589384-1 is prime! Time : 489.0 sec.
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Old 2008-12-13, 09:44   #389
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Quote:
Originally Posted by IronBits View Post
user=IronBits
[2008-12-12 21:14:59]
813*2^589384-1 is prime! Time : 489.0 sec.

And you have another from Fri. too.

And...Glenn also has one from Fri.
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Old 2008-12-13, 13:33   #390
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691*2^589341-1 is prime
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Old 2008-12-13, 13:46   #391
IronBits
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user=IronBits
[2008-12-12 23:57:45]
921*2^589470-1 is prime! Time : 459.0 sec.

When I submitted it, I saw this for the fist time.
(Unverified because Untested)
Does that mean it's a new one?

Last fiddled with by IronBits on 2008-12-13 at 13:47
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Old 2008-12-13, 13:50   #392
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[2008-12-13 13:46]
603*2^599288-1 is prime! Time : 764.0 sec.

(It's Prime Day, Kman1293 also found one)

Last fiddled with by em99010pepe on 2008-12-13 at 13:51
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Old 2008-12-13, 16:47   #393
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Quote:
Originally Posted by IronBits View Post
user=IronBits
[2008-12-12 23:57:45]
921*2^589470-1 is prime! Time : 459.0 sec.

When I submitted it, I saw this for the fist time.
(Unverified because Untested)
Does that mean it's a new one?

Whew! Awesome prime day!

It just means that the top-5000 site hasn't tested it for primality yet. It's been verified now.

If the prime had previously been submitted, it wouldn't have gotten that far so yes, that also means it's a new one.


Gary
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Old 2008-12-13, 16:59   #394
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Old 2008-12-13, 17:00   #395
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I have to get in on the action too:

679*2^589659-1 is prime

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Old 2008-12-13, 17:25   #396
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user=Kman1293
[2008-12-12 02:40]
409*2^599013-1 is prime! Time : 949.0 sec.
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