999998 · 10153256 - 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:999998 · 10153256 - 1
Verification status (*):Proven
Official Comment (*):Near-repdigit
Proof-code(s): (*):L554 : Barnes, Srsieve, LLR
Decimal Digits:153262   (log10 is 153261.99999913)
Rank (*):40914 (digit rank is 1)
Entrance Rank (*):9227
Currently on list? (*):no
Submitted:1/20/2011 05:58:34 UTC
Last modified:3/11/2023 15:54:10 UTC
Database id:97521
Status Flags:none
Score (*):40.8692 (normalized score 0.0159)

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 88
Subcategory: "Near-repdigit"
(archival tag id 213091, tag last modified 2024-02-07 04:37:20)

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_id97521
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 999998 10 153256 -1 2>&1 [Elapsed time: 9.407 seconds]
modified2020-07-07 22:30:32
created2011-01-20 06:05:02
id124430

fieldvalue
prime_id97521
person_id9
machineDitto P4 P4
whatprime
notesCommand: /home/ditto/client/pfgw -tp -q"999998*10^153256-1" 2>&1 PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing 999998*10^153256-1 [N+1, Brillhart-Lehmer-Selfridge] Running N+1 test using discriminant 3, base 1+sqrt(3) Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(65536,20) to FFT(65536,19) Reduced from FFT(65536,19) to FFT(65536,18) Reduced from FFT(65536,18) to FFT(65536,17) Reduced from FFT(65536,17) to FFT(65536,16) 1018268 bit request FFT size=(65536,16) Calling Brillhart-Lehmer-Selfridge with factored part 69.89% 999998*10^153256-1 is prime! (-1765.4919s+0.0200s) [Elapsed time: 3.40 hours]
modified2020-07-07 22:30:32
created2011-01-20 07:11:38
id124434

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