primV(10986, - 1, 9756)
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At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important databases at The Prime Pages: a collection of research, records and results all about prime numbers. This page summarizes our information about one of these primes.

This prime's information:

field (help)value
Description:primV(10986, - 1, 9756)
Verification status (*):PRP
Official Comment:Generalized Lucas primitive part
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):x23 : Renze, Water, Broadhurst, Primo, OpenPFGW
Decimal Digits:26185   (log10 is 26184.6405968784)
Rank (*):61201 (digit rank is 1)
Entrance Rank (*):19289
Currently on list? (*):short
Submitted:12/25/2005 16:12:28 CDT
Last modified:12/25/2005 16:37:35 CDT
Database id:76546
Status Flags:Verify
Score (*):35.4194 (normalized score 0.0002)

Archival tags:

There are certain forms classed as archivable: these prime may (at times) remain on this list even if they do not make the Top 5000 proper.  Such primes are tracked with archival tags.
Generalized Lucas primitive part (archivable *)
Prime on list: yes, rank 16
Subcategory: "Generalized Lucas primitive part"
(archival tag id 191631, tag last modified 2016-07-21 21:20:29)

User comments about this prime (disclaimer):

User comments are allowed to convey mathematical information about this number, how it was proven prime.... See our guidelines and restrictions.

David Broadhurst writes (11 Sep 2014): 
CHG proof with ECPP helper primV(10986,-1,1620)/9719. For a certificate of proof see http://physics.open.ac.uk/~dbroadhu/cert/b9756.zip

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.
fieldvalue
prime_id76546
person_id9
machineLinux P4 2.8GHz
whattrial_divided
notesCommand: /home/caldwell/client/pfgw -o -f -q"primV(10986,-1,9756)" 2>&1
PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4]
trial factoring to 8109930
primV(10986,-1,9756) has no small factor.
[Elapsed time: 20.650 seconds]
modified2005-12-28 20:24:31
created2005-12-25 16:22:00
id81948

fieldvalue
prime_id76546
person_id9
machineLinux P4 2.8GHz
whatprp
notesCommand: /home/caldwell/client/pfgw -f -tc -q"primV(10986,-1,9756)" 2>&1
PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4]
Primality testing primV(10986,-1,9756) [N-1/N+1, Brillhart-Lehmer-Selfridge]
trial factoring to 8109930
Running N-1 test using base 43
Using SSE2 FFT
Adjusting authentication level by 1 for PRIMALITY PROOF
Reduced from FFT(12288,21) to FFT(12288,20)
Reduced from FFT(12288,20) to FFT(12288,19)
Reduced from FFT(12288,19) to FFT(12288,18)
Reduced from FFT(12288,18) to FFT(12288,17)
Reduced from FFT(12288,17) to FFT(12288,16)
173976 bit request FFT size=(12288,16)
Running N+1 test using discriminant 79, base 6+sqrt(79)
Using SSE2 FFT
Adjusting authentication level by 1 for PRIMALITY PROOF
Reduced from FFT(12288,21) to FFT(12288,20)
Reduced from FFT(12288,20) to FFT(12288,19)
Reduced from FFT(12288,19) to FFT(12288,18)
Reduced from FFT(12288,18) to FFT(12288,17)
Reduced from FFT(12288,17) to FFT(12288,16)
173984 bit request FFT size=(12288,16)
Calling N-1 BLS with factored part 1.48% and helper 0.00% (4.44% proof)
primV(10986,-1,9756) is Fermat and Lucas PRP! (873.9900s+0.2905s)
[Elapsed time: 875 seconds]
modified2005-12-28 20:24:31
created2005-12-25 16:23:00
id81949

Query times: 0.0004 seconds to select prime, 0.0005 seconds to seek comments.