236886206865 · 2666668 - 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:236886206865 · 2666668 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L955 : Domanov1, TwinGen, PrimeGrid, LLR
Decimal Digits:200699   (log10 is 200698.43968909)
Rank (*):29260 (digit rank is 240)
Entrance Rank (*):1166
Currently on list? (*):no
Submitted:9/20/2009 18:30:03 CDT
Last modified:9/20/2009 19:20:29 CDT
Removed (*):5/3/2011 20:44:15 CDT
Database id:90044
Status Flags:none
Score (*):41.699 (normalized score 0.0651)

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.
machineRedHat P4 P4
notesCommand: /home/caldwell/client/llr.pl 236886206865*2^666668-1 2>&1 Starting Lucas Lehmer Riesel prime test of 236886206865*2^666668-1 Using Zero Padded IBDWT : Mersenne fftlen = 32768, Used fftlen = 65536 V1 = 11 ; Computing U0... V1 = 11 ; Computing U0...done. Starting Lucas-Lehmer loop... 236886206865*2^666668-1 is prime! Time : 1336.595 sec. [Elapsed time: 22.28 minutes]
modified2020-07-07 17:30:37
created2009-09-20 18:32:35

machineDitto P4 P4
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 236886206865 2 666668 -1 2>&1 [Elapsed time: 9.821 seconds]
modified2020-07-07 17:30:37
created2009-09-20 18:35:11

Query times: 0.0005 seconds to select prime, 0.0007 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.