22976221 - 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:22976221 - 1
Verification status (*):Proven
Official Comment:Mersenne 36
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):G2 : Spence, GIMPS, Prime95
Decimal Digits:895932   (log10 is 895931.79472505)
Rank (*):330 (digit rank is 1)
Entrance Rank (*):1
Currently on list? (*):short
Submitted:8/24/1997
Last modified:8/24/1997
Database id:4
Status Flags:none
Score (*):46.2958 (normalized score 13.0286)

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.
Mersenne (archivable *)
Prime on list: yes, rank 14
Subcategory: "Mersenne"
(archival tag id 187016, tag last modified 2016-01-19 07:57:44)

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.

Chris Caldwell writes (11 Sep 2014): 
For more information see notes/2976221/.

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_id4
person_id9
machineRedHat P4 P4
whatprime
notesCommand: /home/caldwell/client/llr.pl 1*2^2976221-1 2>&1
Prime95 or Mprime are much better to test this Mersenne number !!
Starting Lucas-Lehmer loop...

1*2^2976221-1 is prime! Time : 14734.887 sec.
[Elapsed time: 4.09 hours]
modified2008-09-12 14:12:35
created2008-08-07 02:19:43
id100234

Query times: 0.0003 seconds to select prime, 0.0007 seconds to seek comments.