277947065536 + 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:277947065536 + 1
Verification status (*):Proven
Official Comment (*):Generalized Fermat
Proof-code(s): (*):p343 : Brown1, GeneFer, AthGFNSieve, PrimeGrid, OpenPFGW
Decimal Digits:422312   (log10 is 422311.49303399)
Rank (*):12782 (digit rank is 1)
Entrance Rank (*):503
Currently on list? (*):no
Submitted:7/25/2012 16:27:17 UTC
Last modified:3/11/2023 15:54:10 UTC
Removed (*):4/23/2019 11:59:06 UTC
Database id:108493
Status Flags:none
Score (*):43.9863 (normalized score 0.375)

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 Fermat (archivable *)
Prime on list: no, rank 4307
Subcategory: "Generalized Fermat"
(archival tag id 214446, tag last modified 2024-03-27 01:37:27)

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_id108493
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 1 2779470 65536 1 2>&1 [Elapsed time: 7.869 seconds]
modified2020-07-07 22:30:25
created2012-07-25 16:35:01
id146571

fieldvalue
prime_id108493
person_id9
machineRedHat Virtual STEM Server
whatprime
notesCommand: /home/caldwell/client/pfgw -t -q"2779470^65536+1" 2>&1 PFGW Version 3.3.4.20100405.x86_Stable [GWNUM 25.14] Primality testing 2779470^65536+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 11 Calling Brillhart-Lehmer-Selfridge with factored part 39.42% 2779470^65536+1 is prime! (10665.9174s+0.1082s) [Elapsed time: 2.96 hours]
modified2020-07-07 22:30:25
created2012-07-25 16:52:33
id146572

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