9 · 10107663 - 1
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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:9 · 10107663 - 1
Verification status (*):Proven
Official Comment:Near-repdigit
Proof-code(s): (*):p122 : Sun, NewPGen, PRP, OpenPFGW
Decimal Digits:107664   (log10 is 107663.954242509)
Rank (*):39358 (digit rank is 1)
Entrance Rank (*):295
Currently on list? (*):no
Submitted:1/21/2004 10:00:28 CDT
Last modified:1/21/2004 10:00:28 CDT
Database id:68467
Status Flags:none
Score (*):39.7817 (normalized score 0.0141)

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.
Near-repdigit (archivable *)
Prime on list: no, rank 96
Subcategory: "Near-repdigit"
(archival tag id 211058, tag last modified 2019-04-14 05:20:23)

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_id68467
person_id9
machineLinux P4 2.8GHz
whatprime
notesCommand: /home/caldwell/client/pfgw -f -tp -q"9*10^107663-1" 2>&1
PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4]
Primality testing 9*10^107663-1 [N+1, Brillhart-Lehmer-Selfridge]
trial factoring to 36885479
Running N+1 test using discriminant 7, base 1+sqrt(7)
Using SSE2 FFT
Adjusting authentication level by 1 for PRIMALITY PROOF
Reduced from FFT(49152,20) to FFT(49152,19)
Reduced from FFT(49152,19) to FFT(49152,18)
Reduced from FFT(49152,18) to FFT(49152,17)
Reduced from FFT(49152,17) to FFT(49152,16)
715320 bit request FFT size=(49152,16)
Running N+1 test using discriminant 7, base 2+sqrt(7)
Using SSE2 FFT
Adjusting authentication level by 1 for PRIMALITY PROOF
Reduced from FFT(49152,20) to FFT(49152,19)
Reduced from FFT(49152,19) to FFT(49152,18)
Reduced from FFT(49152,18) to FFT(49152,17)
Reduced from FFT(49152,17) to FFT(49152,16)
715320 bit request FFT size=(49152,16)
Calling Brillhart-Lehmer-Selfridge with factored part 69.90%
9*10^107663-1 is prime! (24806.2021s+0.0126s)
modified2004-03-04 09:24:08
created2004-01-21 17:25:06
id73420

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