2573943681015 · 21290000 - 1
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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:2573943681015 · 21290000 - 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):L927 : Brown1, TwinGen, PrimeGrid, LLR
Decimal Digits:388342   (log10 is 388341.105005576)
Rank (*):6125 (digit rank is 972)
Entrance Rank (*):3677
Currently on list? (*):no
Submitted:2/19/2016 23:17:57 CDT
Last modified:2/19/2016 23:50:31 CDT
Removed (*):1/13/2017 10:41:57 CDT
Database id:121217
Status Flags:TrialDiv
Score (*):43.7286 (normalized score 0.9763)

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_id121217
person_id9
machineUsing: Xeon 4c+4c 3.5GHz
whatprime
notesCommand: /home/caldwell/client/llr.pl 2573943681015*2^1290000-1 2>&1
Starting Lucas Lehmer Riesel prime test of 2573943681015*2^1290000-1
Using zero-padded AVX FFT length 128K, Pass1=128, Pass2=1K
V1 = 15 ; Computing U0...
V1 = 15 ; Computing U0...done.Starting Lucas-Lehmer loop...


2573943681015*2^1290000-1 is prime! (388342 decimal digits) Time : 777.955 sec.
[Elapsed time: 12.97 minutes]
modified2016-04-08 12:40:26
created2016-02-19 23:21:01
id166850

Query times: 0.0004 seconds to select prime, 0.0007 seconds to seek comments.