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255 · 2450144 - 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:255 · 2450144 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):g320 : Griffin, NewPGen, NPLB, PRP, Proth.exe
Decimal Digits:135510   (log10 is 135509.252908348)
Rank (*):37225 (digit rank is 1)
Entrance Rank (*):479
Currently on list? (*):no
Submitted:9/1/2005 02:22:05 CDT
Last modified:9/1/2005 02:56:57 CDT
Removed (*):9/5/2009 11:30:01 CDT
Database id:75489
Status Flags:none
Score (*):40.4902 (normalized score 0.0247)

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.
machineLinux P4 2.8GHz
notesCommand: /home/caldwell/client/ 255*2^450144-1 2>&1
Starting Lucas Lehmer Riesel prime test of 255*2^450144-1
V1 = 5 ; Computing U0...
Done Computing U0.
Starting Lucas-Lehmer loop...
255*2^450144-1 is prime! Time : 2036.129 sec.
[Elapsed time: 2036 seconds]
modified2005-09-23 12:19:27
created2005-09-01 02:23:01

Query times: 0.0004 seconds to select prime, 0.0003 seconds to seek comments.
Printed from the PrimePages <> © Chris Caldwell.