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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
Verification status (*):PRP
Official Comment:Fibonacci cofactor, ECPP
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):c8 : Water, Broadhurst, Primo
Decimal Digits:7239   (log10 is 7238.1415660648)
Rank (*):76785 (digit rank is 11)
Entrance Rank (*):67264
Currently on list? (*):short
Submitted:7/1/2013 09:05:39 CDT
Last modified:7/1/2013 09:50:44 CDT
Database id:114543
Status Flags:Verify
Score (*):31.4377 (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 263
Subcategory: "ECPP"
(archival tag id 217194, tag last modified 2018-03-14 05:50:22)
Fibonacci cofactor (archivable *)
Prime on list: yes, rank 14
Subcategory: "Fibonacci cofactor"
(archival tag id 217195, tag last modified 2017-04-14 17:50:17)

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): 

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/pfgw -o -f -q"U(34807)/551750980997908879677508732866536453" 2>&1
PFGW Version [GWNUM 26.5]
U(34807)/5517509....7508732866536453 1/1 mro=0

trial factoring to 2025355
U(34807)/5517509809...2866536453 has no small factor.
[Elapsed time: 1.804 seconds]
modified2013-08-16 09:44:45
created2013-07-01 09:18:01

machineWinXP Dual Core 2.6GHz 32-bit
notesCommand: pfgw32.exe -tc -q"U(34807)/551750980997908879677508732866536453" 2>&1
PFGW Version [GWNUM 27.8]
Primality testing U(34807)/5517509809...2866536453 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 11, base 7+sqrt(11)
Calling N-1 BLS with factored part 0.10% and helper 0.01% (0.30% proof)
U(34807)/5517509809...2866536453 is Fermat and Lucas PRP! (11.9308s+0.0024s)
[Elapsed time: 12 seconds]
modified2013-08-16 09:44:45
created2013-07-01 09:30:23

Query times: 0.0001 seconds to select prime, 0.0001 seconds to seek comments.