298989 · 23886857 + 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.

This prime's information:

Description:298989 · 23886857 + 1
Verification status (*):Proven
Official Comment (*):Generalized Cullen
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):L2777 : Ritschel, Gcwsieve, TOPS, LLR
Decimal Digits:1170067   (log10 is 1170066.0215117)
Rank (*):861 (digit rank is 1)
Entrance Rank (*):69
Currently on list? (*):short
Submitted:12/31/2014 08:54:03 UTC
Last modified:5/20/2023 20:59:19 UTC
Database id:119034
Status Flags:none
Score (*):47.1148 (normalized score 7.4144)

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 Cullen (archivable *)
Prime on list: yes, rank 20
Subcategory: "Generalized Cullen"
(archival tag id 217876, tag last modified 2024-08-17 05:37:11)

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.

Thomas Ritschel writes (31 Dec 2014):  (report abuse)
298989*8192^298989+1

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_id119034
person_id9
machineUsing: Xeon 4c+4c 3.5GHz
whatprime
notesCommand: /home/caldwell/client/pfgw/pfgw64 -t -q"298989*2^3886857+1" 2>&1 PFGW Version 3.7.7.64BIT.20130722.x86_Dev [GWNUM 27.11] Primality testing 298989*2^3886857+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 7 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 298989*2^3886857+1 is prime! (8802.5792s+0.0013s) [Elapsed time: 2.45 hours]
modified2020-07-07 22:30:17
created2014-12-31 09:01:01
id164638

Query times: 0.0002 seconds to select prime, 0.0004 seconds to seek comments.
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