515 · 22517626 - 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:515 · 22517626 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L5516 : Piesker, PSieve, Srsieve, NPLB, LLR
Decimal Digits:757884   (log10 is 757883.65567075)
Rank (*):3769 (digit rank is 1)
Entrance Rank (*):3207
Currently on list? (*):yes
Submitted:7/31/2023 04:09:43 UTC
Last modified:8/1/2023 02:37:35 UTC
Database id:136314
Status Flags:none
Score (*):45.7822 (normalized score 2.1673)

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_id136314
person_id9
machineUsing: Digital Ocean Droplet
whatprime
notesCommand: /var/www/clientpool/1/pfgw64 -V -f -tp -q"515*2^2517626-1" 2>&1
PFGW Version 4.0.4.64BIT.20221214.x86_Dev [GWNUM 30.11]
Primality testing 515*2^2517626-1 [N+1, Brillhart-Lehmer-Selfridge]
trial
Running N+1 test using discriminant 3, base 1+sqrt(3)
Special modular reduction using FMA3 FFT length 160K, Pass1=640, Pass2=256, clm=2 on 515*2^2517626-1
Detected in MAXERR>0.45 (round off check) in Exponentiator::Iterate
Iteration: 35/2517637 ERROR: ROUND OFF 0.46875>0.45
(Test aborted, try again using the -a1 switch)
Running N+1 test using discriminant 3, base 1+sqrt(3)
Special modular reduction using FMA3 FFT length 168K, Pass1=896, Pass2=192, clm=2 on 515*2^2517626-1
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%


515*2^2517626-1 is prime! (7870.4086s+0.0019s)
[Elapsed time: 2.19 hours]
modified2023-08-01 01:55:13
created2023-07-31 23:44:02
id182145

Query times: 0.0004 seconds to select prime, 0.0003 seconds to seek comments.
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