4285 · 2603970 + 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:4285 · 2603970 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L1341 : DUrso, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:181817   (log10 is 181816.718432)
Rank (*):30330 (digit rank is 1)
Entrance Rank (*):4947
Currently on list? (*):no
Submitted:1/15/2011 11:44:46 CDT
Last modified:1/15/2011 12:20:22 CDT
Removed (*):1/19/2011 21:03:57 CDT
Database id:97435
Status Flags:none
Score (*):41.395 (normalized score 0.058)

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/TrialDiv/TrialDiv -q 4285 2 603970 1 2>&1 [Elapsed time: 9.490 seconds]
modified2020-07-07 17:30:32
created2011-01-15 11:48:12

machineRedHat Virtual STEM Server
notesCommand: /home/caldwell/client/pfgw -t -q"4285*2^603970+1" 2>&1 PFGW Version [GWNUM 25.14] Primality testing 4285*2^603970+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 4285*2^603970+1 is prime! (639.3303s+0.0008s) [Elapsed time: 10.82 minutes]
modified2020-07-07 17:30:32
created2011-01-15 12:01:12

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