38529154785 · 2173250 - 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:38529154785 · 2173250 - 1
Verification status (*):Proven
Official Comment (*):Twin (p)
Proof-code(s): (*):L3494 : Batalov, NewPGen, LLR
Decimal Digits:52165   (log10 is 52164.032538267)
Rank (*):60478 (digit rank is 2)
Entrance Rank (*):45476
Currently on list? (*):no
Submitted:7/25/2014 06:52:43 UTC
Last modified:5/20/2023 20:59:19 UTC
Database id:118247
Status Flags:none
Score (*):37.5478 (normalized score 0.0005)

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 30
Subcategory: "Twin (p)"
(archival tag id 217767, 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.
machineXeon 4c+4c 3.5GHz
notesCommand: /home/caldwell/client/llr.pl 38529154785*2^173250-1 2>&1 Starting Lucas Lehmer Riesel prime test of 38529154785*2^173250-1 Using zero-padded AVX FFT length 18K, Pass1=384, Pass2=48 V1 = 5 ; Computing U0... V1 = 5 ; Computing U0...done.Starting Lucas-Lehmer loop... 38529154785*2^173250-1 is prime! (52165 decimal digits) Time : 15.068 sec. [Elapsed time: 15.00 seconds]
modified2020-07-07 22:30:17
created2014-07-25 07:01:01

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