469949 · 21649228 - 1
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At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important databases at The Prime Pages: 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:

field (help)value
Description:469949 · 21649228 - 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):L160 : Wong, ProthSieve, RieselSieve, LLR
Decimal Digits:496473   (log10 is 496472.76973965)
Rank (*):1370 (digit rank is 1)
Entrance Rank (*):56
Currently on list? (*):yes
Submitted:10/28/2007 09:51:44 CDT
Last modified:10/28/2007 14:13:47 CDT
Database id:82771
Status Flags:none
Score (*):44.4833 (normalized score 2.127)

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.
machineRedHat P4 P4
notesCommand: /home/caldwell/client/TrialDiv/TrialDiv -q 469949 2 1649228 -1 2>&1
[Elapsed time: 10.238 seconds]
modified2011-12-27 16:48:49
created2007-10-28 09:52:02

machineRedHat P4 P4
notesCommand: /home/caldwell/client/llr.pl 469949*2^1649228-1 2>&1
Starting Lucas Lehmer Riesel prime test of 469949*2^1649228-1
V1 = 4 ; Computing U0...
Done Computing U0.
Starting Lucas-Lehmer loop...
469949*2^1649228-1 is prime! Time : 15645.821 sec.
[Elapsed time: 4.35 hours]
modified2008-01-03 10:54:43
created2007-10-28 09:53:01

Query times: 0.0004 seconds to select prime, 0.0005 seconds to seek comments.