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Old 2008-01-14, 21:05   #1
monst
 
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Default I think I found a huge prime

LLR has reported a very large prime on one of my computers today. No - it's not more than 10 million digits, but it is larger than any other I've been involved with in the Prime Pages database. I will re-run this number with both LLR and PFGW on the two cores of another machine. Stay tuned.

Last fiddled with by monst on 2008-01-14 at 21:42 Reason: will confirm with PFGW instead of Proth
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Old 2008-01-14, 21:37   #2
Flatlander
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How many digits?
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Old 2008-01-14, 21:46   #3
monst
 
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Just under a million, but larger than SB9.
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Old 2008-01-15, 00:49   #4
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Assuming the doublecheck pans out... Grats!

However, if it is a base-2 number, then LLR has already "proven" it so you can submit it to Prime Pages directly; no need for a doublecheck (especially with PFGW which will take a lot more time).
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Old 2008-01-15, 01:50   #5
monst
 
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The form of the number is: k*2^n - 1

I realize the LLR has proven it prime, but I want to double-check that there was no glitch during the initial LLR run. On my second machine, LLR will finish in about 4 hours. PFGW will take much longer. If LLR reports it prime again, I will submit it to the Prime Pages for their verification.

Furthermore, this number is NOT part of a twin pair; NOR part of a Sophie Germain pair. (That would have shattered those records!)
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Old 2008-01-15, 02:07   #6
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Quote:
Originally Posted by monst View Post
The form of the number is: k*2^n - 1

I realize the LLR has proven it prime, but I want to double-check that there was no glitch during the initial LLR run. On my second machine, LLR will finish in about 4 hours. PFGW will take much longer. If LLR reports it prime again, I will submit it to the Prime Pages for their verification.
Excellent. Looking forward to seeing a new entry up in the top

BTW, were you doing a fixed-n or fixed-k search?
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Old 2008-01-15, 05:07   #7
monst
 
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The LLR test on the second computer confirmed the first result...

3139*2^3321905-1 is prime (999,997 digits)

I have entered it into the Primes database for verification.
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Old 2008-01-15, 05:31   #8
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Remarkable! Congrats.
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Old 2008-01-15, 11:05   #9
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Congratulations!
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Old 2008-01-15, 11:22   #10
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congrats. A monster from Monst !!
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Old 2008-01-15, 11:57   #11
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Quote:
Originally Posted by monst View Post
The LLR test on the second computer confirmed the first result...
3139*2^3321905-1 is prime (999,997 digits)
I have entered it into the Primes database for verification.
Any details on this remarkable discovery? Sieve depth? Weight of this particular "k"? Ranges of "n" you have tested? etc.
Anyways HUGE congratulations
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