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19 · 26989 - 1

At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important PrimePages database: a collection of research, records and results all about prime numbers. This page summarizes our information about one of these primes.

Description:19 · 26989 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):D : Dubner, Cruncher
Decimal Digits:2106   (log10 is 2105.17739329652)
Rank (*):97961 (digit rank is 20)
Entrance Rank (*):3629
Currently on list? (*):no
Submitted:1994
Last modified:1994
Removed (*):3/1996
Database id:34698
Status Flags:none
Score (*):27.597 (normalized score 0)

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_id34698
person_id9
machineWindows XP P4 1.8GHz
whatprime
notesPrimality testing 19*2^6989-1 [N+1, Brillhart-Lehmer-Selfridge] Calling Brillhart-Lehmer-Selfridge with factored part 99.94% 19*2^6989-1 is prime! (1.453000 seconds) PFGW Version 1.1 for Windows Running N+1 test using discriminant 3, base 1+sqrt(3)
modified2003-03-25 11:26:00
created2002-12-08 20:40:45
id30623

Query times: 0.0004 seconds to select prime, 0.0007 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.