309431698875 · 21290000 - 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:309431698875 · 21290000 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L3274 : Schouten, TwinGen, PrimeGrid, LLR
Decimal Digits:388341   (log10 is 388340.18497134)
Rank (*):11216 (digit rank is 1457)
Entrance Rank (*):993
Currently on list? (*):no
Submitted:1/24/2013 19:18:55 CDT
Last modified:1/24/2013 21:20:24 CDT
Removed (*):11/16/2015 01:26:19 CDT
Database id:110825
Status Flags:none
Score (*):43.7286 (normalized score 0.6081)

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_id110825
person_id9
machineRedHat P4 P4
whatprime
notesCommand: /home/caldwell/client/llr.pl 309431698875*2^1290000-1 2>&1 Starting Lucas Lehmer Riesel prime test of 309431698875*2^1290000-1 Using Zero Padded IBDWT : Mersenne fftlen = 65536, Used fftlen = 131072 V1 = 5 ; Computing U0... V1 = 5 ; Computing U0...done. Starting Lucas-Lehmer loop... 309431698875*2^1290000-1 is prime! Time : 5338.490 sec. [Elapsed time: 88.97 minutes]
modified2020-07-07 17:30:23
created2013-01-24 19:23:02
id151925

fieldvalue
prime_id110825
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 309431698875 2 1290000 -1 2>&1 [Elapsed time: 10.211 seconds]
modified2020-07-07 17:30:23
created2013-01-24 19:35:02
id151926

Query times: 0.0004 seconds to select prime, 0.0006 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.