147855! - 1
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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:147855! - 1
Verification status (*):Proven
Official Comment:Factorial
Proof-code(s): (*):p362 : Snow, Fpsieve, PrimeGrid, OpenPFGW
Decimal Digits:700177   (log10 is 700176.47747442)
Rank (*):287 (digit rank is 1)
Entrance Rank (*):191
Currently on list? (*):short
Submitted:9/1/2013 03:41:50 CDT
Last modified:9/4/2013 05:50:28 CDT
Database id:115328
Status Flags:TrialDiv
Score (*):45.5391 (normalized score 7.4919)

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.
Factorial primes (archivable *)
Prime on list: yes, rank 2
Subcategory: "Factorial"
(archival tag id 217220, tag last modified 2013-09-04 05:50:30)

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_id115328
person_id9
machineRedHat P4 P4
whatprime
notesCommand: /home/caldwell/client/pfgw -tp -q"147855!-1" 2>&1
PFGW Version 3.4.5.32BIT.20110215.x86_Dev [GWNUM 26.5]
Primality testing 147855!-1 [N+1, Brillhart-Lehmer-Selfridge]
Running N+1 test using discriminant 147881, base 1+sqrt(147881)
Calling Brillhart-Lehmer-Selfridge with factored part 33.50%
147855!-1 is prime! (266159.7136s+2.5370s)
[Elapsed time: 3.08 days]
modified2013-10-21 18:10:45
created2013-09-01 03:53:01
id160813

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