21480284945595 · 2333443 - 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.
This prime's information:
| Description: | 21480284945595 · 2333443 - 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | Sophie Germain (p) |
| Proof-code(s): (*): | L6029 : Schmidt2, Kwok, LLR2, TwinGen, NewPGen, TPS, LLR |
| Decimal Digits: | 100390 (log10 is 100389.67688422) |
| Rank (*): | 49067 (digit rank is 2) |
| Entrance Rank (*): | 48447 |
| Currently on list? (*): | yes |
| Submitted: | 5/6/2024 17:02:46 UTC |
| Last modified: | 5/6/2024 21:37:11 UTC |
| Database id: | 138073 |
| Status Flags: | none |
| Score (*): | 39.5662 (normalized score 0.0038) |
Archival tags:
There are certain forms classed as archivable: these prime may (at times) remain on this list even if they do not make the Top 5000 proper. Such primes are tracked with archival tags.
- Sophie Germain (p) (archivable *)
- Prime on list: yes, rank 4
Subcategory: "Sophie Germain (p)"
(archival tag id 229525, tag last modified 2024-10-04 20:37:13)
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.
field value prime_id 138073 person_id 9 machine Using: Digital Ocean Droplet what prime notes Command: /var/www/clientpool/1/pfgw64 -V -f -tp -q"21480284945595*2^333443-1" >command_output 2>&1
PFGW Version 4.0.4.64BIT.20221214.x86_Dev [GWNUM 30.11]
Primality testing 21480284945595*2^333443-1 [N+1, Brillhart-Lehmer-Selfridge]
trial
Running N+1 test using discriminant 11, base 1+sqrt(11)
Special modular reduction using generic reduction AVX-512 FFT length 32K on 21480284945595*2^333443-1
Detected in MAXERR>0.45 (round off check) in Exponentiator::Iterate
Iteration: 36/333489 ERROR: ROUND OFF 0.48926>0.45
(Test aborted, try again using the -a1 switch)
Running N+1 test using discriminant 11, base 1+sqrt(11)
Special modular reduction using generic reduction AVX-512 FFT length 40K, Pass1=128, Pass2=320, clm=1 on 21480284945595*2^333443-1
Calling Brillhart-Lehmer-Selfridge with factored part 99.99%
21480284945595*2^333443-1 is prime! (524.2805s+0.0002s)
[Elapsed time: 8.75 minutes]modified 2024-05-06 20:45:58 created 2024-05-06 20:37:13 id 183915
Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
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