66444866235 · 2200003 - 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:66444866235 · 2200003 - 1
Verification status (*):Proven
Official Comment (*):Twin (p)
Proof-code(s): (*):L95 : Urushi, LLR
Decimal Digits:60218   (log10 is 60217.724684215)
Rank (*):57658 (digit rank is 16)
Entrance Rank (*):45744
Currently on list? (*):no
Submitted:4/2/2016 01:38:55 UTC
Last modified:5/20/2023 20:59:19 UTC
Database id:121503
Status Flags:none
Score (*):37.9907 (normalized score 0.0008)

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.
Twin Primes (archivable *)
Prime on list: no, rank 25
Subcategory: "Twin (p)"
(archival tag id 218311, tag last modified 2024-05-06 08:37:28)

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.
machineUsing: Xeon 4c+4c 3.5GHz
notesCommand: /home/caldwell/client/llr.pl 66444866235*2^200003-1 2>&1 Starting Lucas Lehmer Riesel prime test of 66444866235*2^200003-1 Using zero-padded AVX FFT length 20K, Pass1=320, Pass2=64 V1 = 5 ; Computing U0... V1 = 5 ; Computing U0...done.Starting Lucas-Lehmer loop... 66444866235*2^200003-1 is prime! (60218 decimal digits) Time : 17.838 sec. [Elapsed time: 18.00 seconds]
modified2020-07-07 22:30:16
created2016-04-02 01:42:17

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