216290 · 167216290 - 1

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.

Description:216290 · 167216290 - 1
Verification status (*):Proven
Official Comment (*):Generalized Woodall
Proof-code(s): (*):L2777 : Ritschel, Gcwsieve, TOPS, LLR
Decimal Digits:480757   (log10 is 480756.68058095)
Rank (*):5432 (digit rank is 1)
Entrance Rank (*):292
Currently on list? (*):short
Submitted:10/21/2012 04:29:11 CDT
Last modified:10/21/2012 22:20:25 CDT
Database id:109909
Status Flags:none
Score (*):44.3845 (normalized score 0.9418)

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 Woodall (archivable *)
Prime on list: yes, rank 15
Subcategory: "Generalized Woodall"
(archival tag id 214600, tag last modified 2019-11-26 12:20:12)

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 216290 167 216290 -1 2>&1 [Elapsed time: 9.182 seconds]
modified2020-07-07 17:30:23
created2012-10-21 04:35:01

machineDitto P4 P4
notesCommand: /home/ditto/client/pfgw -tp -q"216290*167^216290-1" 2>&1 PFGW Version [GWNUM 26.5] Primality testing 216290*167^216290-1 [N+1, Brillhart-Lehmer-Selfridge] Running N+1 test using discriminant 7, base 7+sqrt(7) Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 216290*167^216290-1 is prime! (61432.3572s+0.0352s) [Elapsed time: 17.06 hours]
modified2020-07-07 17:30:23
created2012-10-21 04:49:46

Query times: 0.0002 seconds to select prime, 0.0002 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.