81505264551807 · 233444 + 5
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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:81505264551807 · 233444 + 5
Verification status (*):PRP
Official Comment:Triplet (3), ECPP
Proof-code(s): (*):c58 : Kaiser1, NewPGen, OpenPFGW, Primo
Decimal Digits:10082   (log10 is 10081.558360648)
Rank (*):73807 (digit rank is 1)
Entrance Rank (*):60344
Currently on list? (*):no
Submitted:7/23/2012 10:27:48 CDT
Last modified:7/23/2012 10:50:29 CDT
Database id:108459
Status Flags:Verify
Score (*):32.4653 (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 171
Subcategory: "ECPP"
(archival tag id 214441, tag last modified 2018-09-22 16:20:28)
Triplet (archivable class *)
Prime on list: no, rank 24
Subcategory: "Triplet (3)"
(archival tag id 214442, tag last modified 2018-09-19 08:50:27)

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.
machineDitto P4 P4
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 81505264551807 2 33444 5 2>&1
[Elapsed time: 8.182 seconds]
modified2012-08-14 21:01:05
created2012-07-23 10:35:18

machineDitto P4 P4
notesCommand: /home/ditto/client/pfgw -tc -q"81505264551807*2^33444+5" 2>&1
PFGW Version [GWNUM 26.5]
Primality testing 81505264551807*2^33444+5 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N+1 test using discriminant 5, base 5+sqrt(5)
Calling N-1 BLS with factored part 0.10% and helper 0.08% (0.40% proof)
81505264551807*2^33444+5 is Fermat and Lucas PRP! (42.1779s+0.0231s)
[Elapsed time: 43.00 seconds]
modified2012-08-14 21:01:05
created2012-07-23 10:38:14

Query times: 0.0004 seconds to select prime, 0.0003 seconds to seek comments.