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: 187 · 247877 - 1 Verification status (*): Proven Official Comment: Generalized Woodall Proof-code(s): (*): g155 : Augustin, Proth.exe Decimal Digits: 14415   (log10 is 14414.684944011) Rank (*): 59078 (digit rank is 4) Entrance Rank (*): 2970 Currently on list? (*): no Submitted: 3/27/2000 19:24:20 CDT Last modified: 3/27/2000 19:24:20 CDT Database id: 13129 Status Flags: none Score (*): 33.5728 (normalized score 0)

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 Woodall (archivable *)

Prime on list: no, rank 191
Subcategory: "Generalized Woodall"
(archival tag id 192576, tag last modified 2013-04-17 00:50:29)

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 13129 person_id 9 machine Windows XP P4 1.8GHz what prime notes Primality testing 187*2^47877-1 [N+1, Brillhart-Lehmer-Selfridge] Calling Brillhart-Lehmer-Selfridge with factored part 99.99% 187*2^47877-1 is prime! (77.016000 seconds) PFGW Version 1.1 for Windows Running N+1 test using discriminant 3, base 1+sqrt(3) modified 2003-03-25 11:25:20 created 2002-12-10 07:54:18 id 36347