78 · 622402915 - 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: | 78 · 622402915 - 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | [none] |
| Proof-code(s): (*): | L5645 : Orpen1, SRBase, LLR |
| Decimal Digits: | 1125662 (log10 is 1125661.9449423) |
| Rank (*): | 950 (digit rank is 1) |
| Entrance Rank (*): | 625 |
| Currently on list? (*): | yes |
| Submitted: | 5/25/2023 07:28:10 UTC |
| Last modified: | 5/25/2023 16:37:14 UTC |
| Database id: | 136088 |
| Status Flags: | none |
| Score (*): | 46.9961 (normalized score 6.4772) |
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 136088 person_id 9 machine Using: Digital Ocean Droplet what prime notes Command: /var/www/clientpool/1/pfgw64 -V -f -tp -q"78*622^402915-1" 2>&1
PFGW Version 4.0.4.64BIT.20221214.x86_Dev [GWNUM 30.11]
Primality testing 78*622^402915-1 [N+1, Brillhart-Lehmer-Selfridge]
trial
Running N+1 test using discriminant 5, base 1+sqrt(5)
Special modular reduction using AVX-512 FFT length 400K, Pass1=640, Pass2=640, clm=1 on 78*622^402915-1
Detected in MAXERR>0.45 (round off check) in Exponentiator::Iterate
Iteration: 39/3739369 ERROR: ROUND OFF 0.4585>0.45
(Test aborted, try again using the -a1 switch)
Running N+1 test using discriminant 5, base 1+sqrt(5)
Special modular reduction using AVX-512 FFT length 420K, Pass1=960, Pass2=448, clm=1 on 78*622^402915-1
Detected in MAXERR>0.45 (round off check) in Exponentiator::Iterate
Iteration: 142542/3739369 ERROR: ROUND OFF 0.4511>0.45
(Test aborted, try again using the -a2 (or possibly -a0) switch)
Running N+1 test using discriminant 5, base 1+sqrt(5)
Special modular reduction using AVX-512 FFT length 432K, Pass1=1152, Pass2=384, clm=1 on 78*622^402915-1
Calling Brillhart-Lehmer-Selfridge with factored part 89.22%
78*622^402915-1 is prime! (29856.6855s+0.0142s)
[Elapsed time: 8.29 hours]modified 2023-05-25 15:46:39 created 2023-05-25 07:29:02 id 181918
Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
Printed from the PrimePages <t5k.org> © Reginald McLean.