809 · 2749745 + 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:809 · 2749745 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L1277 : Porzezinski, Srsieve, PrimeGrid, LLR
Decimal Digits:225699   (log10 is 225698.64204761)
Rank (*):22041 (digit rank is 1)
Entrance Rank (*):893
Currently on list? (*):no
Submitted:2/18/2010 12:24:52 CDT
Last modified:2/18/2010 15:20:30 CDT
Removed (*):4/20/2012 04:48:59 CDT
Database id:91898
Status Flags:none
Score (*):42.0602 (normalized score 0.1178)

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_id91898
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 809 2 749745 1 2>&1 [Elapsed time: 9.790 seconds]
modified2020-07-07 17:30:36
created2010-02-18 12:35:02
id113168

fieldvalue
prime_id91898
person_id9
machineDitto P4 P4
whatprime
notesCommand: /home/ditto/client/pfgw -t -q"809*2^749745+1" 2>&1 PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing 809*2^749745+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(98304,20) to FFT(98304,19) Reduced from FFT(98304,19) to FFT(98304,18) Reduced from FFT(98304,18) to FFT(98304,17) Reduced from FFT(98304,17) to FFT(98304,16) 1499518 bit request FFT size=(98304,16) Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 809*2^749745+1 is prime! (-1076.2173s+0.0000s) [Elapsed time: 54.12 minutes]
modified2020-07-07 17:30:36
created2010-02-18 14:00:34
id113175

Query times: 0.0002 seconds to select prime, 0.0002 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.