U(551, - 1, 5669)

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.

This prime's information:

Description:U(551, - 1, 5669)
Verification status (*):PRP
Official Comment (*):Generalized Lucas number
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):x25 : Broadhurst, Water, OpenPFGW, Primo
Decimal Digits:15537   (log10 is 15536.855368769)
Rank (*):76568 (digit rank is 1)
Entrance Rank (*):64653
Currently on list? (*):no
Submitted:5/2/2016 10:41:50 UTC
Last modified:5/20/2023 20:59:19 UTC
Database id:121608
Status Flags:Verify
Score (*):33.8049 (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.
Generalized Lucas Number (archivable *)
Prime on list: no, rank 27
Subcategory: "Generalized Lucas Number"
(archival tag id 218326, tag last modified 2023-10-24 02:37:13)

User comments about this prime (disclaimer):

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David Broadhurst writes (2 May 2016):  (report abuse)
CHG proof at 15537 digits and 27.34% factorization with details in http://physics.open.ac.uk/~dbroadhu/cert/b5669.zip and a certificate compressed to 6 MB in http://physics.open.ac.uk/~dbroadhu/cert/b55669_cert.gp.gz

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_id121608
person_id9
machineUsing: Xeon (pool) 4c+4c 3.5GHz
whatprp
notesCommand: /home/caldwell/clientpool/1/pfgw64 -tc -q"lucasU(551,-1,5669)" 2>&1 PFGW Version 3.7.7.64BIT.20130722.x86_Dev [GWNUM 27.11] Primality testing lucasU(551,-1,5669) [N-1/N+1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 2 Running N+1 test using discriminant 23, base 1+sqrt(23) Calling N-1 BLS with factored part 0.84% and helper 0.66% (3.18% proof) lucasU(551,-1,5669) is Fermat and Lucas PRP! (17.5333s+0.0013s) [Elapsed time: 17.00 seconds]
modified2020-07-07 22:30:16
created2016-05-02 10:43:02
id167246

Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
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