7835 · 2561073 + 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:7835 · 2561073 + 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):L1207 : Storch, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:168904   (log10 is 168903.69679618)
Rank (*):28886 (digit rank is 1)
Entrance Rank (*):4955
Currently on list? (*):no
Submitted:10/20/2010 00:34:37 CDT
Last modified:10/20/2010 01:20:23 CDT
Removed (*):10/22/2010 17:00:50 CDT
Database id:95542
Status Flags:none
Score (*):41.1683 (normalized score 0.075)

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_id95542
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 7835 2 561073 1 2>&1
[Elapsed time: 10.268 seconds]
modified2011-12-27 16:48:36
created2010-10-20 00:35:01
id120466

fieldvalue
prime_id95542
person_id9
machineDitto P4 P4
whatprime
notesCommand: /home/ditto/client/pfgw -t -q"7835*2^561073+1" 2>&1
PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4]
Primality testing 7835*2^561073+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Using SSE2 FFT
Adjusting authentication level by 1 for PRIMALITY PROOF
Reduced from FFT(65536,20) to FFT(65536,19)
Reduced from FFT(65536,19) to FFT(65536,18)
1122180 bit request FFT size=(65536,18)
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
7835*2^561073+1 is prime! (1556.7300s+0.0000s)
[Elapsed time: 26.52 minutes]
modified2010-11-28 11:14:56
created2010-10-20 00:38:01
id120469

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