427 · 22391685 - 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:427 · 22391685 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L5516 : Piesker, PSieve, Srsieve, NPLB, LLR
Decimal Digits:719972   (log10 is 719971.55560748)
Rank (*):3838 (digit rank is 1)
Entrance Rank (*):3260
Currently on list? (*):yes
Submitted:5/15/2023 19:37:34 UTC
Last modified:5/20/2023 20:59:19 UTC
Database id:136047
Status Flags:none
Score (*):45.6247 (normalized score 1.981)

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_id136047
person_id9
machineUsing: Digital Ocean Droplet
whatprime
notesCommand: /var/www/clientpool/1/pfgw64 -V -tp -q"427*2^2391685-1" 2>&1
PFGW Version 4.0.4.64BIT.20221214.x86_Dev [GWNUM 30.11]
Primality testing 427*2^2391685-1 [N+1, Brillhart-Lehmer-Selfridge]
Running N+1 test using discriminant 3, base 1+sqrt(3)
Special modular reduction using AVX-512 FFT length 192K, Pass1=192, Pass2=1K, clm=1 on 427*2^2391685-1
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%


427*2^2391685-1 is prime! (5005.9568s+0.0006s)
[Elapsed time: 83.43 minutes]
modified2023-05-16 02:51:08
created2023-05-16 01:27:42
id181877

Query times: 0.0006 seconds to select prime, 0.0005 seconds to seek comments.
Printed from the PrimePages <t5k.org> © Reginald McLean.