777 · 2247788 - 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:777 · 2247788 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L187 : Galvan, NewPGen, NPLB, LLR
Decimal Digits:74595   (log10 is 74594.5109866)
Rank (*):53164 (digit rank is 1)
Entrance Rank (*):4489
Currently on list? (*):no
Submitted:7/7/2006 21:37:27 UTC
Last modified:3/11/2023 15:54:10 UTC
Removed (*):10/10/2006 22:50:00 UTC
Database id:78089
Status Flags:none
Score (*):38.6509 (normalized score 0.002)

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.
machineGenToo P3 400MHz
notesCommand: /home/caldwell/client/TrialDiv/TrialDiv -q 777 2 247788 -1 2>&1 [Elapsed time: 9.451 seconds]
modified2020-07-07 22:30:42
created2006-07-07 21:52:03

machineRedHat P4 P4
notesCommand: /home/caldwell/client/llr.pl 777*2^247788-1 2>&1 Starting Lucas Lehmer Riesel prime test of 777*2^247788-1 V1 = 9 ; Computing U0... Done Computing U0. Starting Lucas-Lehmer loop... 777*2^247788-1 is prime! Time : 215.681 sec. [Elapsed time: 216 seconds]
modified2020-07-07 22:30:42
created2006-07-07 21:53:01

Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
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