8881 · 21558852 + 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:8881 · 21558852 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L1957 : Hemsley, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:469266   (log10 is 469265.15926266)
Rank (*):6055 (digit rank is 1)
Entrance Rank (*):3616
Currently on list? (*):no
Submitted:2/4/2020 09:21:08 CDT
Last modified:2/4/2020 10:20:16 CDT
Removed (*):2/10/2021 21:42:19 CDT
Database id:130369
Status Flags:TrialDiv
Score (*):44.3102 (normalized score 0.8636)

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.
machineUsing: Xeon (pool) 4c+4c 3.5GHz
notesCommand: /home/caldwell/clientpool/1/pfgw64 -t -q"8881*2^1558852+1" 2>&1 PFGW Version [GWNUM 29.8] Primality testing 8881*2^1558852+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 8881*2^1558852+1 is prime! (2347.9227s+0.0005s) [Elapsed time: 39.13 minutes]
modified2020-07-07 17:30:10
created2020-02-04 09:33:01

Query times: 0.0005 seconds to select prime, 0.0008 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.