121181421 · 2333333 - 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:121181421 · 2333333 - 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):L207 : McKibbon, NewPGen, PrimeGrid, TPS, LLR
Decimal Digits:100352   (log10 is 100351.3149807)
Rank (*):43097 (digit rank is 53)
Entrance Rank (*):3021
Currently on list? (*):no
Submitted:1/31/2007 21:40:12 CDT
Last modified:1/31/2007 22:02:33 CDT
Removed (*):7/2/2007 15:01:52 CDT
Database id:79310
Status Flags:none
Score (*):39.565 (normalized score 0.0131)

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_id79310
person_id9
machineRedHat P4 P4
whattrial_divided
notesCommand: /home/caldwell/client/TrialDiv/TrialDiv -q 121181421 2 333333 -1 2>&1
[Elapsed time: 9.426 seconds]
modified2007-03-03 21:00:42
created2007-01-31 21:52:02
id87721

fieldvalue
prime_id79310
person_id9
machineRedHat P4 P4
whatprime
notesCommand: /home/caldwell/client/llr.pl 121181421*2^333333-1 2>&1
Starting Lucas Lehmer Riesel prime test of 121181421*2^333333-1
V1 = 9 ; Computing U0...
Done Computing U0.
Starting Lucas-Lehmer loop...
121181421*2^333333-1 is prime! Time : 572.180 sec.
[Elapsed time: 572 seconds]
modified2007-03-03 21:00:42
created2007-01-31 21:53:01
id87723

Query times: 0.0004 seconds to select prime, 0.0006 seconds to seek comments.