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9867 · 2452980 + 1

At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important PrimePages database: a collection of research, records and results all about prime numbers. This page summarizes our information about one of these primes.

Description:9867 · 2452980 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L692 : Rickard, Srsieve, PrimeGrid, LLR
Decimal Digits:136365   (log10 is 136364.561621)
Rank (*):37082 (digit rank is 1)
Entrance Rank (*):3414
Currently on list? (*):no
Submitted:5/4/2009 07:15:14 CDT
Last modified:5/4/2009 07:50:39 CDT
Removed (*):9/20/2009 11:07:14 CDT
Database id:88054
Status Flags:none
Score (*):40.5095 (normalized score 0.0252)

Verification data:

The Top 5000 Primes is a list for proven primes only. In order to maintain the integrity of this list, we seek to verify the primality of all submissions.  We are currently unable to check all proofs (ECPP, KP, ...), but we will at least trial divide and PRP check every entry before it is included in the list.
machineRedHat P4 P4
notesCommand: /home/caldwell/client/TrialDiv/TrialDiv -q 9867 2 452980 1 2>&1
[Elapsed time: 9.681 seconds]
modified2011-12-27 16:48:44
created2009-05-04 07:18:01

machineRedHat P4 P4
notesCommand: /home/caldwell/client/pfgw -t -q"9867*2^452980+1" 2>&1
PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4]
Primality testing 9867*2^452980+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Using SSE2 FFT
Adjusting authentication level by 1 for PRIMALITY PROOF
Reduced from FFT(57344,20) to FFT(57344,19)
Reduced from FFT(57344,19) to FFT(57344,18)
Reduced from FFT(57344,18) to FFT(57344,17)
Reduced from FFT(57344,17) to FFT(57344,16)
905996 bit request FFT size=(57344,16)
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
9867*2^452980+1 is prime! (1084.6700s+0.0100s)
[Elapsed time: 18.25 minutes]
modified2009-05-25 07:25:56
created2009-05-04 07:23:02

Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
Printed from the PrimePages <> © Chris Caldwell.