819 · 2981008 - 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:819 · 2981008 - 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):L1838 : Gilvey, PSieve, Srsieve, NPLB, LLR
Decimal Digits:295316   (log10 is 295315.74727023)
Rank (*):13497 (digit rank is 1)
Entrance Rank (*):749
Currently on list? (*):no
Submitted:7/1/2011 14:53:12 CDT
Last modified:7/1/2011 15:50:22 CDT
Removed (*):7/18/2013 04:33:41 CDT
Database id:100680
Status Flags:none
Score (*):42.8869 (normalized score 0.4188)

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_id100680
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 819 2 981008 -1 2>&1
[Elapsed time: 9.811 seconds]
modified2011-12-27 16:48:31
created2011-07-01 15:05:02
id130925

fieldvalue
prime_id100680
person_id9
machineDitto P4 P4
whatprime
notesCommand: /home/ditto/client/llr.pl 819*2^981008-1 2>&1
Starting Lucas Lehmer Riesel prime test of 819*2^981008-1
Using Irrational Base DWT : Mersenne fftlen = 49152, Used fftlen = 65536
V1 = 3 ; Computing U0...
V1 = 3 ; Computing U0...done.
Starting Lucas-Lehmer loop...

819*2^981008-1 is prime! Time : 1722.084 sec.
[Elapsed time: 28.70 minutes]
modified2011-12-27 16:48:31
created2011-07-01 15:08:01
id130926

Query times: 0.0005 seconds to select prime, 0.0003 seconds to seek comments.