9999993 · 10195531 - 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:9999993 · 10195531 - 1
Verification status (*):Proven
Official Comment (*):Near-repdigit
Proof-code(s): (*):L1958 : DUrso, Srsieve, NewPGen, OpenPFGW, LLR
Decimal Digits:195538   (log10 is 195537.9999997)
Rank (*):35091 (digit rank is 1)
Entrance Rank (*):4600
Currently on list? (*):no
Submitted:2/21/2011 23:28:19 UTC
Last modified:3/11/2023 15:54:10 UTC
Database id:98636
Status Flags:none
Score (*):41.6189 (normalized score 0.0337)

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 74
Subcategory: "Near-repdigit"
(archival tag id 213138, 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.
machineDitto P4 P4
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 9999993 10 195531 -1 2>&1 [Elapsed time: 9.335 seconds]
modified2020-07-07 22:30:32
created2011-02-21 23:35:01

machineDitto P4 P4
notesCommand: /home/ditto/client/pfgw -tp -q"9999993*10^195531-1" 2>&1 PFGW Version [GWNUM 26.5] Primality testing 9999993*10^195531-1 [N+1, Brillhart-Lehmer-Selfridge] Running N+1 test using discriminant 17, base 1+sqrt(17) Calling Brillhart-Lehmer-Selfridge with factored part 69.89% 9999993*10^195531-1 is prime! (6253.7954s+0.0089s) [Elapsed time: 1.74 hours]
modified2020-07-07 22:30:32
created2011-02-21 23:38:01

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