33 · 21130884 + 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:33 · 21130884 + 1
Verification status (*):Proven
Official Comment (*):Divides GF(1130881,12)
Proof-code(s): (*):L165 : Keiser, NewPGen, OpenPFGW, LLR
Decimal Digits:340432   (log10 is 340431.5241304)
Rank (*):19856 (digit rank is 2)
Entrance Rank (*):107
Currently on list? (*):no
Submitted:7/7/2006 23:20:42 UTC
Last modified:3/11/2023 15:54:10 UTC
Database id:78090
Status Flags:none
Score (*):43.324 (normalized score 0.2008)

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 Divisors (bases 3,5,6,10,12) (archivable *)
Prime on list: no, rank 23, weight 46.820521712702
Subcategory: "Divides GF(*,12)"
(archival tag id 187100, tag last modified 2023-12-03 17:37:19)

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.
machineGenToo P3 400MHz
notesCommand: /home/caldwell/client/TrialDiv/TrialDiv -q 33 2 1130884 1 2>&1 [Elapsed time: 9.749 seconds]
modified2020-07-07 22:30:42
created2006-07-07 23:22:02

machineRedHat P4 P4
notesCommand: /home/caldwell/client/pfgw -t -q"33*2^1130884+1" 2>&1 PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing 33*2^1130884+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 19 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(131072,20) to FFT(131072,19) Reduced from FFT(131072,19) to FFT(131072,18) 2261788 bit request FFT size=(131072,18) Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 33*2^1130884+1 is prime! (-2146.7446s+0.0000s) [Elapsed time: 6444 seconds]
modified2020-07-07 22:30:42
created2006-07-07 23:23:01

Query times: 0.0003 seconds to select prime, 0.0004 seconds to seek comments.
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