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7237 · 2528788 + 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:7237 · 2528788 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L1320 : Fredriksen, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:159185   (log10 is 159184.90890574)
Rank (*):33215 (digit rank is 1)
Entrance Rank (*):4640
Currently on list? (*):no
Submitted:7/22/2010 16:56:00 CDT
Last modified:7/22/2010 18:50:22 CDT
Removed (*):8/11/2010 00:08:36 CDT
Database id:93675
Status Flags:none
Score (*):40.9859 (normalized score 0.0406)

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_id93675
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 7237 2 528788 1 2>&1
[Elapsed time: 9.617 seconds]
modified2011-12-27 16:48:39
created2010-07-22 17:05:21
id116727

fieldvalue
prime_id93675
person_id9
machineDitto P4 P4
whatprime
notesCommand: /home/ditto/client/pfgw -t -q"7237*2^528788+1" 2>&1
PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4]
Primality testing 7237*2^528788+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Using SSE2 FFT
Adjusting authentication level by 1 for PRIMALITY PROOF
Reduced from FFT(65536,20) to FFT(65536,19)
Reduced from FFT(65536,19) to FFT(65536,18)
Reduced from FFT(65536,18) to FFT(65536,17)
1057610 bit request FFT size=(65536,17)
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
7237*2^528788+1 is prime! (1421.2800s+0.0000s)
[Elapsed time: 23.87 minutes]
modified2010-10-13 12:41:36
created2010-07-22 18:21:51
id116741

Query times: 0.0004 seconds to select prime, 0.0006 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.