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Old 2014-12-15, 03:53   #386
MyDogBuster
 
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Default R28

http://primes.utm.edu/primes/page.php?id=118945

6207*28^430803-1 is prime - R28 is now a 4ker
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Old 2014-12-15, 07:20   #387
Batalov
 
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Angry ...blast!...

Just so that it is not as much a surprise to anyone (as it was for me), --
I've got a huge pseudoprime (k=3072, b=81, Sierp.) and in a short time it will be rejected by the UTM server.

I submitted it after running a 16-thread 7-PRP test using mprime, but postmortem will probably show that I put that "PRPBase=7" option in the wrong file (prime.txt? local.txt? I probably remembered wrong into which one I was supposed to put it), and when it returned success, I submitted it to UTM before running the pfgw -t (which is in base 5).

I am running more tests, but it is likely a fluke. It is a very large 3-SPRP though.
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EDIT: Or maybe it is a prime, after all.

Last fiddled with by Batalov on 2014-12-16 at 01:53 Reason: "the Composite is dead... Long live the Prime!"
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Old 2015-01-01, 21:25   #388
Lennart
 
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Added 119040 : 144*648^186106+1 (523254 digits)

Not the smallest but reprteable :)
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Old 2015-01-05, 18:10   #389
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Added 119053 : 43*648^146608-1 (412202 digits)

Lennart
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Old 2015-01-21, 09:56   #390
unconnected
 
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3147*2^1620488-1 (=3147*2^202561-1 from R256)
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Old 2015-01-21, 21:18   #391
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Added 119124 : 6213*2^1655136-1 (498250 digits)
Another k eliminated from R256 (=6213*256^206892-1).
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Old 2015-01-21, 21:19   #392
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Sorry, there was a typo.
Quote:
Originally Posted by unconnected View Post
3147*2^1620488-1 (=3147*256^202561-1 from R256)
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Old 2015-01-27, 17:17   #393
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Added 119148 : 435*2^1853363-1 (557921 digits)
==3480*256^231670-1
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Old 2015-01-28, 11:07   #394
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One more prime
Added 119151 : 3945*2^1894329-1 (570254 digits)
==7890*256^236791-1

Last fiddled with by unconnected on 2015-01-28 at 11:09
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Old 2015-01-28, 19:33   #395
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Nice run Dmitri!

R256 is now down to 25 k's remaining.
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Old 2015-02-14, 16:33   #396
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one more for vaughan

82*920^262409 - 1 (777727 digits)

base is still running in BOINC, decreased to 4k at the moment
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