258937461585 · 21000000 - 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.

This prime's information:

Description:258937461585 · 21000000 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L3196 : Metcalfe, NewPGen, TPS, LLR
Decimal Digits:301042   (log10 is 301041.40885887)
Rank (*):22433 (digit rank is 36)
Entrance Rank (*):1786
Currently on list? (*):no
Submitted:7/18/2012 17:16:31 UTC
Last modified:3/11/2023 15:54:10 UTC
Removed (*):8/19/2013 08:12:57 UTC
Database id:108392
Status Flags:none
Score (*):42.946 (normalized score 0.1324)

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_id108392
person_id9
machineRedHat P4 P4
whattrial_divided
notesCommand: /home/caldwell/client/TrialDiv/TrialDiv -q 258937461585 2 1000000 -1 2>&1 [Elapsed time: 9.641 seconds]
modified2020-07-07 22:30:25
created2012-07-18 17:18:02
id146369

fieldvalue
prime_id108392
person_id9
machineRedHat Virtual STEM Server
whatprime
notesCommand: /home/caldwell/client/llr.pl 258937461585*2^1000000-1 2>&1 Starting Lucas Lehmer Riesel prime test of 258937461585*2^1000000-1 Using Zero Padded IBDWT : Mersenne fftlen = 57344, Used fftlen = 114688 V1 = 5 ; Computing U0... V1 = 5 ; Computing U0...done.Starting Lucas-Lehmer loop... 258937461585*2^1000000-1 is prime! Time : 1718.361 sec. [Elapsed time: 28.65 minutes]
modified2020-07-07 22:30:25
created2012-07-18 17:22:30
id146370

Query times: 0.0003 seconds to select prime, 0.0003 seconds to seek comments.
Printed from the PrimePages <t5k.org> © Reginald McLean.