V(39769)/18139109172816581
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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:V(39769)/18139109172816581
Verification status (*):PRP
Official Comment:Lucas cofactor, ECPP
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):c8 : Water, Broadhurst, Primo
Decimal Digits:8295   (log10 is 8294.9708491467)
Rank (*):74700 (digit rank is 1)
Entrance Rank (*):67430
Currently on list? (*):short
Submitted:11/7/2013 10:50:17 CDT
Last modified:11/7/2013 12:21:04 CDT
Database id:116239
Status Flags:Verify, TrialDiv
Score (*):31.8605 (normalized score 0)

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.
Elliptic Curve Primality Proof (archivable *)
Prime on list: no, rank 200
Subcategory: "ECPP"
(archival tag id 217428, tag last modified 2017-10-14 12:20:20)
Lucas cofactor (archivable *)
Prime on list: yes, rank 10
Subcategory: "Lucas cofactor"
(archival tag id 217429, tag last modified 2015-03-12 17:20:33)

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): 
certificate

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_id116239
person_id9
machineDitto P4 P4
whatprp
notesCommand: /home/ditto/client/pfgw -tc -q"V(39769)/18139109172816581" 2>&1
PFGW Version 3.4.5.32BIT.20110215.x86_Dev [GWNUM 26.5]
Primality testing V(39769)/18139109172816581 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N+1 test using discriminant 11, base 1+sqrt(11)
Calling N-1 BLS with factored part 0.13% and helper 0.01% (0.41% proof)
V(39769)/18139109172816581 is Fermat and Lucas PRP! (27.4723s+0.0036s)
[Elapsed time: 27.00 seconds]
modified2014-04-01 17:37:40
created2013-11-07 12:13:49
id161742

Query times: 0.0006 seconds to select prime, 0.0006 seconds to seek comments.