26972593 - 1
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New record prime: 274,207,281-1 with 22,338,618 digits by Cooper, Woltman, Kurowski, Blosser & GIMPS (7 Jan 2016).

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:26972593 - 1
Verification status (*):External
Official Comment:Mersenne 38
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):G4 : Hajratwala, Kurowski, GIMPS, Prime95
Decimal Digits:2098960   (log10 is 2098959.64055671)
Rank (*):29 (digit rank is 1)
Entrance Rank (*):1
Currently on list? (*):short
Submitted:6/1/1999
Last modified:6/1/1999
Database id:2
Status Flags:none
Score (*):48.9067 (normalized score 177.3382)

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 12
Subcategory: "Mersenne"
(archival tag id 187011, 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/6972593/.
Query times: 0.0004 seconds to select prime, 0.0007 seconds to seek comments.