19861029 · 21995311 - 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:19861029 · 21995311 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L895 : Dinkel, Srsieve, LLR
Decimal Digits:600656   (log10 is 600655.75968004)
Rank (*):4800 (digit rank is 1)
Entrance Rank (*):262
Currently on list? (*):yes
Submitted:8/16/2013 22:51:09 UTC
Last modified:5/20/2023 20:59:19 UTC
Database id:115093
Status Flags:none
Score (*):45.0684 (normalized score 1.0614)

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.
machineWinXP Dual Core 2.6GHz 64-bit Laptop
notesCommand: cllr64.exe -q"19861029*2^1995311-1" 2>&1 -d Starting Lucas Lehmer Riesel prime test of 19861029*2^1995311-1 Using zero-padded AVX FFT length 200K, Pass1=640, Pass2=320 V1 = 5 ; Computing U0... V1 = 5 ; Computing U0...done. Starting Lucas-Lehmer loop... [Elapsed time: 4038 seconds]
modified2020-07-07 22:30:18
created2013-08-17 17:15:58

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