64767237255 · 2666669 - 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:64767237255 · 2666669 - 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L955 : Domanov1, TwinGen, PrimeGrid, LLR
Decimal Digits:200699   (log10 is 200698.17753468)
Rank (*):32821 (digit rank is 301)
Entrance Rank (*):1205
Currently on list? (*):no
Submitted:9/20/2009 16:32:04 UTC
Last modified:3/11/2023 15:54:10 UTC
Removed (*):4/29/2011 01:42:42 UTC
Database id:90031
Status Flags:none
Score (*):41.699 (normalized score 0.0445)

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.
machineDitto P4 P4
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 64767237255 2 666669 -1 2>&1 [Elapsed time: 9.940 seconds]
modified2020-07-07 22:30:37
created2009-09-20 16:35:11

machineDitto P4 P4
notesCommand: /home/ditto/client/llr.pl 64767237255*2^666669-1 2>&1 Starting Lucas Lehmer Riesel prime test of 64767237255*2^666669-1 Using Zero Padded IBDWT : Mersenne fftlen = 32768, Used fftlen = 65536 V1 = 17 ; Computing U0... V1 = 17 ; Computing U0...done. Starting Lucas-Lehmer loop... 64767237255*2^666669-1 is prime! Time : 1413.765 sec. [Elapsed time: 23.57 minutes]
modified2020-07-07 22:30:37
created2009-09-20 16:48:34

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