V(122869)/40546771 / 1243743094029841

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:V(122869)/40546771 / 1243743094029841
Verification status (*):PRP
Official Comment (*):Lucas cofactor, ECPP
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):E1 : Batalov, CM
Decimal Digits:25656   (log10 is 25655.399682918)
Rank (*):71351 (digit rank is 2)
Entrance Rank (*):71136
Currently on list? (*):short
Submitted:4/24/2024 00:10:33 UTC
Last modified:4/24/2024 05:37:24 UTC
Database id:138004
Status Flags:Verify
Score (*):35.3562 (normalized score 0)

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.
Elliptic Curve Primality Proof (archivable *)
Prime on list: no, rank 51
Subcategory: "ECPP"
(archival tag id 229503, tag last modified 2024-04-24 05:37:25)
Lucas cofactor (archivable *)
Prime on list: yes, rank 3
Subcategory: "Lucas cofactor"
(archival tag id 229504, tag last modified 2024-04-24 05:37:27)

User comments about this prime (disclaimer):

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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_id138004
person_id9
machineUsing: Digital Ocean Droplet
whatprp
notesCommand: /var/www/clientpool/1/pfgw64 -V -f -tc -q"V(122869)/40546771/1243743094029841" >command_output 2>&1
PFGW Version 4.0.4.64BIT.20221214.x86_Dev [GWNUM 30.11]
Primality testing V(122869)/40546771/1243743094029841 [N-1/N+1, Brillhart-Lehmer-Selfridge]
trial


Running N-1 test using base 2
Generic modular reduction using generic reduction AVX-512 FFT length 8K, Pass1=128, Pass2=64, clm=1 on A 85226-bit number
Running N+1 test using discriminant 7, base 2+sqrt(7)
Generic modular reduction using generic reduction AVX-512 FFT length 8K, Pass1=128, Pass2=64, clm=1 on A 85226-bit number
Detected in MAXERR>0.45 (round off check) in Exponentiator::Iterate
Iteration: 36/85243 ERROR: ROUND OFF 0.5>0.45
(Test aborted, try again using the -a1 switch)
Running N+1 test using discriminant 7, base 2+sqrt(7)
Generic modular reduction using generic reduction AVX-512 FFT length 9K on A 85226-bit number
Calling N-1 BLS with factored part 0.07% and helper 0.01% (0.23% proof)


V(122869)/40546771/1243743094029841 is Fermat and Lucas PRP! (28.3430s+0.0069s)
[Elapsed time: 30.00 seconds]
modified2024-04-24 05:23:24
created2024-04-24 05:22:54
id183846

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