204320222925 · 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:204320222925 · 21290000 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L3330 : Wilson3, TwinGen, PrimeGrid, LLR
Decimal Digits:388341   (log10 is 388340.00471789)
Rank (*):13896 (digit rank is 1528)
Entrance Rank (*):847
Currently on list? (*):no
Submitted:11/30/2012 06:25:43 CDT
Last modified:11/30/2012 08:20:27 CDT
Removed (*):11/3/2015 04:50:08 CDT
Database id:110190
Status Flags:none
Score (*):43.7286 (normalized score 0.4207)

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.
machineDitto P4 P4
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 204320222925 2 1290000 -1 2>&1 [Elapsed time: 10.202 seconds]
modified2020-07-07 17:30:23
created2012-11-30 06:35:02

machineDitto P4 P4
notesCommand: /home/ditto/client/llr.pl 204320222925*2^1290000-1 2>&1 Starting Lucas Lehmer Riesel prime test of 204320222925*2^1290000-1 Using Zero Padded IBDWT : Mersenne fftlen = 65536, Used fftlen = 131072 V1 = 9 ; Computing U0... V1 = 9 ; Computing U0...done. Starting Lucas-Lehmer loop... 204320222925*2^1290000-1 is prime! Time : 5449.751 sec. [Elapsed time: 1.51 hours]
modified2020-07-07 17:30:23
created2012-11-30 06:38:01

Query times: 0.0001 seconds to select prime, 0.0002 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.