867 · 21477169 - 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.

Description:867 · 21477169 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L2017 : Hubbard, PSieve, Srsieve, NPLB, LLR
Decimal Digits:444676   (log10 is 444675.11568406)
Rank (*):7144 (digit rank is 1)
Entrance Rank (*):2557
Currently on list? (*):no
Submitted:9/29/2017 23:13:11 CDT
Last modified:9/29/2017 23:50:21 CDT
Removed (*):2/26/2020 06:17:49 CDT
Database id:123915
Status Flags:TrialDiv
Score (*):44.1448 (normalized score 0.7323)

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 867*2^1477169-1 2>&1 Starting Lucas Lehmer Riesel prime test of 867*2^1477169-1 Using AVX FFT length 96K, Pass1=128, Pass2=768 V1 = 3 ; Computing U0... V1 = 3 ; Computing U0...done.Starting Lucas-Lehmer loop... 867*2^1477169-1 is prime! (444676 decimal digits) Time : 633.641 sec. [Elapsed time: 10.57 minutes]
modified2020-07-07 17:30:15
created2017-09-29 23:21:01

Query times: 0.0005 seconds to select prime, 0.0008 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.