221330854131072 + 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: | 221330854131072 + 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | Generalized Fermat |
| Proof-code(s): (*): | L6010 : Chaney, GFNSvCUDA, GeneFer, AthGFNSieve, PrimeGrid, LLR |
| Decimal Digits: | 1093802 (log10 is 1093801.3397468) |
| Rank (*): | 1144 (digit rank is 1) |
| Entrance Rank (*): | 883 |
| Currently on list? (*): | yes |
| Submitted: | 3/24/2024 15:24:38 UTC |
| Last modified: | 3/24/2024 22:37:15 UTC |
| Database id: | 137872 |
| Status Flags: | none |
| Score (*): | 46.9081 (normalized score 5.9167) |
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.
- Generalized Fermat (archivable *)
- Prime on list: no, rank 317
Subcategory: "Generalized Fermat"
(archival tag id 229457, tag last modified 2024-11-23 21:37:10)
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 137872 person_id 9 machine Using: Digital Ocean Droplet what prime notes Command: /var/www/clientpool/1/pfgw64 -V -f -t -q"221330854^131072+1" >command_output 2>&1
PFGW Version 4.0.4.64BIT.20221214.x86_Dev [GWNUM 30.11]
Primality testing 221330854^131072+1 [N-1, Brillhart-Lehmer-Selfridge]
trial
Running N-1 test using base 3
Special modular reduction using generic reduction AVX-512 FFT length 360K, Pass1=960, Pass2=384, clm=1 on 221330854^131072+1
Detected in MAXERR>0.45 (round off check) in Exponentiator::Iterate
Iteration: 130013/3633531 ERROR: ROUND OFF 0.4505>0.45
(Test aborted, try again using the -a1 switch)
Running N-1 test using base 5
Special modular reduction using generic reduction AVX-512 FFT length 384K, Pass1=1K, Pass2=384, clm=1 on 221330854^131072+1
Calling Brillhart-Lehmer-Selfridge with factored part 55.14%
221330854^131072+1 is prime! (25778.7328s+0.0104s)
[Elapsed time: 7.16 hours]modified 2024-03-24 22:34:44 created 2024-03-24 15:25:01 id 183714
Query times: 0.0002 seconds to select prime, 0.0006 seconds to seek comments.
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