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: 386892131072+1 Verification status (*): Proven Official Comment: Generalized Fermat Proof-code(s): (*): p259 : Underbakke, GenefX64, AthGFNSieve, OpenPFGW Decimal Digits: 732377   (log10 is 732376.56366538) Rank (*): 47 (digit rank is 1) Entrance Rank (*): 47 Currently on list? (*): short Submitted: 10/14/2009 21:35:43 CDT Last modified: 10/16/2009 03:20:20 CDT Database id: 90471 Status Flags: none Score (*): 45.6771 (normalized score 157.6683)

Archival tags:

There are certain forms classed as archivable: these prime may (at times) remain on this list even if they do not make the Top 5000 proper.  Such primes are tracked with archival tags.

Generalized Fermat (archivable *)

Prime on list: yes, rank 6
Subcategory: "Generalized Fermat"
(archival tag id 210531, tag last modified 2009-10-16 03:20:21)

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.

field value prime_id 90471 person_id 9 machine Ditto P4 P4 what prime notes Command: /home/ditto/client/pfgw -t -q"386892^131072+1" 2>&1 PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing 386892^131072+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 5 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(327680,19) to FFT(327680,18) Reduced from FFT(327680,18) to FFT(327680,17) Reduced from FFT(327680,17) to FFT(327680,16) 4865814 bit request FFT size=(327680,16) Calling Brillhart-Lehmer-Selfridge with factored part 53.51% 386892^131072+1 is prime! (105661.9220s+0.1560s) [Elapsed time: 29.35 hours] modified 2009-10-16 02:59:03 created 2009-10-14 21:38:01 id 110315

field value prime_id 90471 person_id 9 machine RedHat P4 P4 what trial_divided notes Command: /home/caldwell/client/TrialDiv/TrialDiv -q 1 386892 131072 1 2>&1 [Ellapsed time: 8.183 seconds] modified 2009-10-14 21:48:10 created 2009-10-14 21:48:01 id 110316