9975 · 2929700 + 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:9975 · 2929700 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L3141 : Kus, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:279872   (log10 is 279871.58588171)
Rank (*):17514 (digit rank is 1)
Entrance Rank (*):2235
Currently on list? (*):no
Submitted:7/3/2012 10:04:03 CDT
Last modified:7/3/2012 11:20:22 CDT
Removed (*):3/20/2013 21:47:58 CDT
Database id:108141
Status Flags:none
Score (*):42.7218 (normalized score 0.2286)

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_id108141
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 9975 2 929700 1 2>&1 [Elapsed time: 9.989 seconds]
modified2020-07-07 17:30:25
created2012-07-03 10:05:22
id145865

fieldvalue
prime_id108141
person_id9
machineRedHat Virtual STEM Server
whatprime
notesCommand: /home/caldwell/client/pfgw -t -q"9975*2^929700+1" 2>&1 PFGW Version 3.3.4.20100405.x86_Stable [GWNUM 25.14] Primality testing 9975*2^929700+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 11 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 9975*2^929700+1 is prime! (1326.4680s+0.0006s) [Elapsed time: 22.12 minutes]
modified2020-07-07 17:30:25
created2012-07-03 10:36:29
id145870

Query times: 0.0003 seconds to select prime, 0.0002 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.