28661290941 · 2333333 - 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:28661290941 · 2333333 - 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):L205 : Chambers, NewPGen, PrimeGrid, TPS, LLR
Decimal Digits:100354   (log10 is 100353.68884041)
Rank (*):42564 (digit rank is 735)
Entrance Rank (*):4448
Currently on list? (*):no
Submitted:1/14/2008 09:19:13 CDT
Last modified:1/14/2008 21:36:57 CDT
Removed (*):2/17/2008 18:19:48 CDT
Database id:83544
Status Flags:none
Score (*):39.5651 (normalized score 0.0098)

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_id83544
person_id9
machineRedHat P4 P4
whattrial_divided
notesCommand: /home/caldwell/client/TrialDiv/TrialDiv -q 28661290941 2 333333 -1 2>&1
[Elapsed time: 9.588 seconds]
modified2011-12-27 16:48:48
created2008-01-14 09:24:24
id96194

fieldvalue
prime_id83544
person_id9
machineVista on Core 2 6700 2.66GHz
whatprime
notesCommand: pfgw.exe -n -tp -q"28661290941*2^333333-1" 2>&1
Primality testing 28661290941*2^333333-1 [N+1, Brillhart-Lehmer-Selfridge]
PFGW Version 20030811.Win_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4]
Running N+1 test using discriminant 7, base 1+sqrt(7)
N+1: 28661290941*2^333333-1 2Calling Brillhart-Lehmer-Selfridge with factored part 99.99%
28661290941*2^333333-1 is prime! (2672.1714s+0.0007s)
25000/333369
[Elapsed time: 2672 seconds]
modified2011-12-27 16:48:48
created2008-01-14 20:52:25
id96342

Query times: 0.0008 seconds to select prime, 0.0006 seconds to seek comments.