183916 · 5519597 - 1
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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:183916 · 5519597 - 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):p304 : Babb, Srsieve, SierpinskiRiesel, OpenPFGW
Decimal Digits:363188   (log10 is 363187.98196249)
Rank (*):11204 (digit rank is 1)
Entrance Rank (*):265
Currently on list? (*):no
Submitted:12/26/2010 19:01:07 CDT
Last modified:12/26/2010 22:50:23 CDT
Removed (*):12/17/2014 08:31:18 CDT
Database id:97122
Status Flags:none
Score (*):43.5228 (normalized score 0.6227)

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.
machineDitto P4 P4
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 183916 5 519597 -1 2>&1
[Elapsed time: 10.004 seconds]
modified2011-12-27 16:48:35
created2010-12-26 19:05:01

machineRedHat Virtual STEM Server
notesCommand: /home/caldwell/client/pfgw -tp -q"183916*5^519597-1" 2>&1
PFGW Version [GWNUM 25.14]
Primality testing 183916*5^519597-1 [N+1, Brillhart-Lehmer-Selfridge]
Running N+1 test using discriminant 3, base 4+sqrt(3)
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
183916*5^519597-1 is prime! (11169.0118s+0.0526s)
[Elapsed time: 3.10 hours]
modified2011-01-18 10:15:30
created2010-12-26 19:19:07

Query times: 0.0005 seconds to select prime, 0.0014 seconds to seek comments.